By ETonline Staff
3:16 AM PDT, November 1, 2016
Happy Halloween! Check out the funniest, spookiest, and most creative costumes in Hollywood.
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Gwen Stefani
Twitter
The No Doubt frontwoman put a bloody spin on Alice in Wonderland.
Mac Miller and Ariana Grande
Instagram
The couple rocked a trio of costumes this year, including Pokémon's Eevee and Pikachu and The Matrix's Neo and Trinity, but our favorite by far was their Moonrise Kingdom get-ups.
Russell Wilson and Ciara
Instagram
The newlyweds went presidential for Halloween with President Barack Obama and Hillary Clinton masks. "8 More Days Til I Break The Glass Ceiling! Good Times With My Buddy Obama," Ciara captioned one of their Instagram videos.
Lindsay Lohan
Beretta/Sims/REX/Shutterstock
The Mean Girls star rocked one of this year's most popular costumes, Suicide Squad's Harley Quinn, when she attended Fran Cutler's Halloween party in London, England, on Oct. 31.
DNCE
Instagram
The bandmates channeled frontman Joe Jonas' Disney roots with an amazing recreation of Cruella de Vil and her Dalmatians.
Max Greenfield, Hannah Simone, Jake Johnson, Zooey Deschanel, and Lamorne Morris
Twitter
The New Girl cast was found guilty of having the perfect People vs. O.J. Simpson costumes.
Neil Patrick Harris and David Burtka
Instagram
The actor's family dressed up as iconic old Hollywood figures. Harris sported a Groucho Marx costume, and Burtka donned an impressive Charlie Chaplin getup. Per usual, it was their twins, Harper and Gideon, that stole the show! Harper posed in a glamorous Marilyn Monroe outfit, while Gideon dressed as a little James Dean.
Demi Lovato
Snapchat
The "Body Say" singer shared a selfie of her second costume of Halloween 2016, a sexy maid, via Snapchat.
Scott Disick and Kourtney Kardashian
Kourtney Kardashian/Instagram
Who says Halloween has to end on Oct. 31? The mom of three shared this Instagram pic with her whole family -- including her ex and their three kids, Mason, Penelope, and Reign -- dressed up as superheroes on Nov. 1, along with the adorable caption, "I know it's now November, but..."
Mariska Hargitay and Debra Messing
Instagram
The BFFs had a hair-raising evening as a Pink Lady and Medusa.
Steven Tyler
Universal Orlando Resort
The Aerosmith frontman's holiday was downright cinematic! Tyler dressed up as Rhett Butler from Gone With the Wind when he attended Universal Studios Florida's Halloween Horror Nights, where he posed in the Vamp '55 scarezone, a homecoming parade complete with vampire greasers, football players and homecoming queens.
Sarah Michelle Gellar
Instagram
"Polly wanna kiss?" Gellar made for one very pretty batch of Poison Ivy, aka the Batman villain.
Brittany Snow
Instagram
This snow bunny was very excited about the "snacks on snacks on snacks" at the Halloween party she attended.
Mindy Kaling
Instagram
The actress told her Instagram fans that she suited up in a beekeeper uniform because her "godson was a bee." So cute!
Heidi Klum
Getty Images
This year, it wasn't the German model who had to don a ton of prosthetics. Instead, five clones wore synthetic replicas of her face to go as a sextuplet of identical clones. "This came about because everyone always says, 'How do you juggle it all? How do you juggle it all?' I'm always thinking, 'I wish there were more of me so I could have it much easier,'" Klum told ET.
Channing Tatum and Jenna Dewan Tatum
Instagram
The 35-year-old actress shared photos of her entire family, including 3-year-old daughter Everly, donning super cute Beauty and the Beast-themed costumes on Halloween.
Kris Jenner
Instagram
The Keeping Up With the Kardashians momager rocked a sexy Alice in Wonderland costume to the delight of her daughter, Kylie Jenner.
Wendy Williams
The Wendy Williams Show
The daytime talk show host dressed up as Uhura in honor of Star Trek's 50th anniversary.
Kourtney Kardashian
Instagram
The Keeping Up With the Kardashians star and her three children -- Penelope, Reign and Mason -- dressed up as the Power Rangers. "Happy Halloween!! May the power be with you," Kourtney cleverly captioned her Halloween family photo.
Behati Prinsloo and Adam Levine
AKM-GSI
The new parents stepped out for Maroon 5's annual Halloween bash on Oct. 31. Prinsloo showed off her post-baby bod as Julia Roberts' character, Vivian, in Pretty Woman, while her hubby (and the band's frontman) went as Led Zeppelin's Robert Plant.
Mariah Carey
Instagram
Mariah Carey wasn't letting her recent breakup from fiance James Packer get in the way of her good time. The pop star posted a video of her dressed as a super sexy cat with the hashtag "#HappyHalloween."
Blac Chyna and Rob Kardashian
Instagram
The reality star and his pregnant fiancee wore terrifying getups inspired by The Purge movies. "Find somebody that's just as crazy as you!" Chyna captioned a photo of the couple's costumes.
Kelly Clarkson and Brandon Blackstock
Instagram
The American Idol alum dressed up as Will Ferrell's character in the 2003 holiday comedy, Elf, while her hubby donned a Snow White and the Huntsman costume. "Happy Halloween from the Huntsmen and Buddy the Elf," she tweeted.
Amber Rose and Val Chmerkovskiy
Instagram
The Dancing With the Stars partners went dark when they partied together for Halloween, turning up as a bloody mermaid and spooky skeleton-like thing.
Khloe Kardashian and Tristan Thompson
Twitter
The reality star and her boyfriend had fun celebrating Halloween on Oct. 30, dressing up together in Marvel Comics-inspired get-ups. Kardashian made for an amazing Storm -- complete with white hair and glowing eyes-- while Thompson committed to a full-body Black Panther costume.
Rachel Dratch
Instagram
The Saturday Night Live alum sipped on Pinot Grigio by the Real Housewives of New York's Ramona Singer when she stopped by Watch What Happens Live as Mrs. Roper from Three's Company.
Beyonce, Blue Ivy and Jay Z
Instagram
Mr. and Mrs. Carter dressed up as "Black Barbie" and "Black Ken," but it was their adorable daughter that really stole the show.
Kylie Jenner
Instagram
The 19-year-old reality star channeled "Dirrty"-era Christina Aguilera for Halloween on Oct. 30, and nailed the costume, rocking the whole signature look from Xtina's 2002 video, including the striped bikini, bleached blonde-and-black hair, and even Aguilera's infamous cut-out leather chaps.
Jenni 'JWoww' Farley
Instagram
The reality star, her husband Roger Mathews, and their kids Meilani and Greyson, celebrated Halloween on Oct. 30 as the superpowered family from Pixar's The Incredibles.
Taylor Swift
Instagram
The "Shake It Off" singer borrowed Ryan Reynolds' Deadpool costume for Halloween. "Thanks @vancityreynolds for his costume, you’re the BEST Deadpool inside contact ever," she captioned a pic of her squad.
Justin Timberlake and Jessica Biel
Instagram
The happy couple and their 1-year-old son Silas went trick-or-treating as characters from Timberlake’s animated family film Trolls. "Happy Halloween from Poppy, Branch and lil Branch,” Biel captioned a cute family snapshot she posted to Instagtam on Oct. 31. “We be Trollin'..."
Leona Lewis
Broadimage/REX/Shutterstock
The "Bleeding Love" singer celebrated the spooky holiday at the treats! Magazine Halloween Party in Los Angeles on Oct. 29, and went covered head-to-toe in gold body paint that perfectly matched her dazzling, curve-hugging gold gown, which gave the overall feel of an Oscar statuette.
Blue Ivy, Beyonce and Tina Knowles-Lawson
Instagram
Salt-N-Pepa got the ultimate honor when Blue Ivy, Beyonce and Tina dressed as the hip-hop group for Halloween.
Jay Z
Instagram
The 46-year-old rapper kept up with his family's '80s theme, dressing as Dwayne Wayne from "A Different World."
Scott Disick
WireImage
The 37-year-old reality star dressed up as Clark Kent (just as he begins his transition into Superman) while hosting the American Psycho Halloween Soiree at 1 OAK Nightclub inside The Mirage Hotel & Casino in Las Vegas on Oct. 29.
Megan Hilty, Viola and Brian Gallagher
Twitter
The family posed as the "Winnie the Pooh Crew" in an adorable picture taken by Jenny Anderson.
Jessica Alba
Snapchat
The Sin City actress and her 5-year-old daughter, Haven, dressed up for Halloween as the main characters from Nickelodeon's Shimmer and Shine. Alba shared pics of their cute costumes to Snapchat on Oct. 29.
"Good Morning America"
Ida Mae Astute/ABC
ABC's morning show crew showed off their spooktacular costumes for their annual Halloween extravaganza.
Emily Ratajkowski
Madison McGaw/BFA/Rex/Shutterstock
The Gone Girl actress showed off her enviable figure in a Cleopatra costume by Yandy.com for the Bacardi x Kenzo "We Are the Night" Immersive Haunted House Experience in Brooklyn, New York, on Oct. 29. She attended with her boyfriend, Jeff Magid, who also wore an ancient-themed garb, and a small group of friends, though an eyewitness tells ET that Ratajkowski and her beau got cozy and snuggled up at a lounge seat.
Emma Roberts
Instagram
The Scream Queens star opted for a simple-yet-spooky look for Halloween, rocking an expertly painted skull face in a black-and-white snapshot she posted to Instagram on Oct. 28.
Shonda Rhimes
Instagram
Leave it to Rhimes to perfectly channel Beyoncé, rocking a look from Queen Bey's "Formation" video.
Jerry O'Connell and Kelly Ripa
Instagram
Kelly and Jerry channeled Batman villains Joker and Harley Quinn for an epic "Live! With Kelly" spooktacular.
Kelly Ripa
YouTube
The "Live! With Kelly" host put on an epic spoof of Lin-Manuel Miranda's 'Hamilton,' dressed as the musical's lead.
Matthew Morrison and Renee Puente
Instagram
The husband-and-wife duo dressed as the Joker and Harley Quinn at Morrison's 7th Annual Halloween Party Presented by Freixenet Cava and Podwall Entertainment in Los Angeles.
Orlando Bloom and Katy Perry
Splash News
The two had the perfect couple's costume, dressing as Bill and Hillary Clinton at Kate Hudson's annual Halloween party in Los Angeles.
Heidi Klum and Ellen DeGeneres
Michael Rozman/Warner Bros
Heidi and Ellen recreated the "Chandelier" music video, dressing up as Maddie Ziegler and Sia.
Bette Midler
Getty Images
The legendary entertainer was a real crowd-pleaser at the 2016 Hulaween Party Celebrating New York Restoration Project's 21st Anniversary. She dressed as her 'Hocus Pocus' character, Winnie Sanderson, for the event that took place at The Waldorf Astoria in New York City.
Paris Hilton
Instagram
After dressing up as Little Red Riding Hood earlier this week, the socialite kept the children's story theme going strong with this revealing Alice in Wonderland costume. The House of Wax star shared a pic of her costume to Instagram on Oct. 30, which she captioned, "Paris in Wonderland."
Mindy Kaling
Twitter
The Mindy Project star donned a pilot's outfit and a white mustache for her Halloween costume, however, she wasn't content with simply going as Sully. As Kaling explained in her tweet, posted Oct. 30, she's "dressed up as Tom Hanks as 'Sully' Sullenberger III from the film 'Sully,' directed by Clint Eastwood."
Floyd Mayweather
Twitter
The retired boxing champ donned Iron Man's iconic armor for Halloween. "If I'm going to be any superhero, I have to be the richest superhero #TonyStarks aka #IronMan #Halloween2016," Mayweather tweeted on Oct. 30, along with a photo of his impressive costume.
Patrick Schwarzenegger
Instagram
The 23-year-old actor made gamers everywhere jealous with this epic Bowser costume, which he shared to Instagram on Oct. 29.
Demi Lovato and Nick Jonas
Instagram
The 24-year-old pop stars celebrated Halloween dressed up as Dorothy and the Scarecrow from The Wizard of Oz. Jonas took to Instagram to share a cute pic of himself and Lovato on Oct. 29.
Alessandra Ambrosio
Instagram
The Victoria's Secret angel showed off her famous figure while dressed as one of film's sexiest starlets, Jessica Rabbit. The 35-year-old super model took to Instagram on Oct. 29 to reveal her scarlet ensemble, writing, "So much fun being #JessicaRabbit last night."
Hilary Duff and Jason Walsh
Getty Images for Casamigos Tequila
The Younger star and her new boyfriend made their first public appearance dressed in (semi-controversial) controversial Thanksgiving-themed costumes at George Clooney, Rande Gerber, and Mike Meldman's annual Casamigos Tequila Halloween Party in Beverly Hills, California, on Oct. 28.
Ariel Winter
Instagram
The Modern Family star showed some skin as a Playboy bunny on Oct. 28 for a party at the Playboy mansion. The 19-year-old actress rocked a sexy $37 costume from Los Angeles-based custom lingerie store Trashy Lingerie, and shared a number of pics from the wild night to Instagram.
Kate Hudson
Instagram
The hostest with the mostest and her group of lovely female friends showed off their wild wild west get-ups for Hudson's soiree, which was sponsored by Aboslut Elyx.
Elle Evans and Matt Bellamy
Splash News
The Muse frontman is clearly very friendly with his ex-fiancée, Kate Hudson, turning up to her Halloween bash with his new girlfriend, Elle Evans. The pair appeared to be zombie versions of Sandy and Danny from Grease.
Kaia and Cindy Crawford
Getty Images for Casamigos Tequila
Crawford made the annual Casamigos Halloween party -- thrown by her husband, Rande Gerber and his co-founders George Clooney and Mike Meldman at a private residence in Beverly Hills, California, on Oct. 28 -- a family affair. Her whole crew, including daughter Kaia, dressed up as Sex Pistols-inspired punk rockers.
Charlotte McKinney
Getty Images for Casamigos Tequila
The swimsuit model and former DWTS competitor rocked a skin-baring leather ensemble that gave off a biker girl/queen of the dominatrix vampires vibe at the Casamigos Tequila Halloween Party in Beverly Hills, California on Oct. 28.
Nicole Richie
Instagram
Two of Richie's pals helped her pull off an epic Siegfried & Roy group costume for Hudson's bash.
Zach Braff
Getty Images for Casamigos Tequila
Is that you, Tom Cruise? The Scrubs alum got his Top Gun on at the Casamigos bash.
Harry Hamlin and Lisa Rinna
Getty Images for Casamigos Tequila
The longtime couple looked fetching as iconic duo Sonny and Cher.
Seth MacFarlane
Getty Images for Casamigos Tequila
The Family Guy creator's Oscar the Crouch one-piece came complete a worm and a sign on the garbage can reading "Scram!"
Julia Carey and James Corden
Broadimage/REX/Shutterstock
The Late Late Show host and his wife also turned up for the same Beverly Hills fête, with Corden commanding attention in a bright orange NASA space suit.
Ryan Seacrest
Getty Images for Casamigos Tequila
Just like Kylie Jenner, the Keeping Up With the Kardashians' executive producer donned a skeleton costume, though Seacrest's jumper was for the Casamigos party.
Molly Sims and Scott Stuber
Getty Images
The expectant parents (Sims is pregnant with the couple's third child) put a little magic into the Casamigos party, attending as a gypsy and Harry Potter.
Leonardo DiCaprio
AKM-GSI
Just call DiCaprio the wolf of Beverly Hills! The actor donned a wolf mask as he hit up the Casamigos party with a group of male friends, who were joined later in the evening by newly single Tobey Maguire.
Ryan Lochte
Getty Images
The Olympic gold medalist knows we're all mad on Halloween -- especially when dressed up as the Mad Hatter from Alice in Wonderland!
Jenna Dewan Tatum
Getty Images
She may have a penchant for mermaids, but the 35-year-old actress looked just as lovely as a unicorn at the Casamigos party, complete with an all-white ensemble, lilac wig, and horn.
Andy Garcia
Getty Images for Casamigos Tequila
The 60-year-old actor paid his respects to the Day of the Dead in full sugar skull makeup and a dapper three-piece suit.
Paris Hilton
Getty Images for Casamigos Tequila
The socialite didn't stray far from her traditional sexy Halloween costumes, turning up to the Casamigos Halloween Party as a slightly more risqué Little Red Riding Hood.
Joanna Krupa
Getty Images
The model's butterfly costume for the same fête consisted of a colorful, barely-there top, over-sized wings, two tutus, and a pink bobbed wig.
Bette Midler and Kathy Griffin
Getty Images for Casamigos Tequila
The singer held her annual Hulaween Party at New York City's iconic Waldorf Astoria hotel on Oct. 28. Midler delighted fans with her full Hocus Pocus costume, while Griffin was anything but a throwback, dressing up as Snapchat's deer filter!
Marc Jacobs
Getty Images
So built! The designer rocked a very detailed female bodybuilder costume for Midler's Hulaween party.
Sheryl Underwood
CBS
The 52-year-old comedian got all dressed up and "Tutti Frutti" as she changed into her epic Little Richard costume for The Talk's second annual "Rocktober Lip Sync War" on Oct. 28.
Julie Chen
CBS
Madonna definitely has some fans among The Talk hosts! Julie Chen, who transformed into the singer's "Express Yourself" look last year, chose to go with Madonna's Victorian get-up from her 1990 MTV VMAs performance of "Vogue" this year.
Sharon Osbourne
CBS
It's not Marilyn -- it's Madonna! Osbourne must have been thinking pink this year, as she dressed as the pop superstar (dressed as Monroe in Gentleman Prefer Blondes) in her "Material Girl" video.
Sara Gilbert
CBS
Gilbert had no problem showing off some skin as she hopped into Cher's black leotard from her iconic 1989 video, "If I Could Turn Back Time." The mother of three finished her look with knee-high boots, a leather jacket, and Cher's signature black curls.
Shakira
Instagram
The 39-year-old singer played magician as she got into the Halloween spirit on Oct. 25. "Abracadabra!" she captioned the adorable pic on her Instagram.
Justin Mikita and Jesse Tyler Ferguson
Instagram
Any questions? The Modern Family star and his husband dipped into very recent entertainment news for their costumes, putting their own spin on SNL's David S. Pumpkins sketch.
Ashley Tisdale, Shenae Grimes-Beech and Vanessa Hudgens
Instagram
The trio got spooky while celebrating Grimes-Beech's birthday on Oct. 24. "Happy birthday vibes for @shenaegrimesbeech," Hudgens captioned the photo on Instagram.
Dorothy Wang and E.J. Johnson
Broadimage/REX/Shutterstock
The Rich Kids of Beverly Hills co-stars channeled their inner divas for Maxim magazine's annual Halloween party in Los Angeles on Oct. 22, with Wang dressing as Poison Ivy and Johnson going as -- we're not sure, but he rocked that silky fabric and pearls!
Tara Reid
Getty Images
The American Pie star wore a skimpy Greek goddess costume to Maxim magazine's annual party on Oct. 22.
Eva Marcille
Broadimage/REX/Shutterstock
The model turned up at the Maxim party as a belly-baring hybrid of G.I. Jane and Lara Croft from Tomb Raider.
Sharna Burgess and James Hinchcliffe
DJ Pauly D and Aubrey O'Day
Instagram
The former Danity Kane singer made for one sexy unicorn at the Maxim party, rocking a white lace bodysuit, pastel hair and tail, and a gilded crown. Her Jersey Shore star boyfriend was equally as mystical as a dragon. Even cooler? According to her Instagram, O'Day made the costumes!
Monique Coleman
Getty Images
The High School Musical alum attended Dream Halloween 2016 at Los Angeles' The Park Plaza with her husband, Walter Jordan, on Oct. 22. Coleman dressed up as a troll for the event, which benefits the Starlight Children's Foundation and was sponsored by Michaels Stores.
Lauren Conrad
Instagram
The former Hills star -- and queen of DIY Halloween -- showed off her cute circus performer costumes with friends on Oct. 19.
Lauren Miller Rogen and Seth Rogen
Getty Images
The actor-producer and his wife wore one of the best couple costumes of all time, Mario and Luigi, for Hilarity for Charity's 5th Annual Los Angeles Variety Show: Seth Rogen's Halloween on Oct. 15. Throughout the event, the Neighbors 2 star -- who founded HFC and runs charity events for the non-profit annually -- also got on stage dressed as Pika-Jew, a Tyrannosaurs rex, and a clown.
Scott Eastwood
Getty Images
The 30-year-old actor brilliantly channeled dad Clint Eastwood's The Man With No Name character from the 1967 film The Good, the Bad and the Ugly at the Hilarity for Charity Halloween event in Hollywood, California, which raised over $1.6 million to help families affected by Alzheimer's.
Jemima Khan
Getty Images
The British journalist and heiress called out Donald Trump in a controversial "groper" costume at the UNICEF UK Halloween Ball in London, England, on Oct. 13.