The Best Celeb Halloween Costumes

He may be a hockey fan, but the "What Do You Mean?" singer proved he likes the hardwood as much as ice when he dressed up as Semi-Pro’s Jackie Moon on Oct. 30. Will Ferrell would be proud!

The "Focus" singer was more "moo" than "boo" when she appeared on The Ellen DeGeneres Show in the cutest cow costume ever on Oct. 30. Seriously, look at those bedazzled ears!

She may be from New Jersey, but Kelly made for the ultimate "California gurl" when she dressed up as pop star Katy Perry for the LIVE! with Kelly and Michael Halloween special on Oct. 30. Even better? Her co-star stood by her side as the ultimate meme, Left Shark!

The talk show host and his sidekick went full force with their Halloween costumes, donning Yoda and Princess Leia costumes for the Oct. 29 episode of Jimmy Kimmel Live!.

Hough looked fang-tastic in his getup for Dancing With the Stars' Halloween episode, 

"I want to suck your blood !!!!" Hough captioned the Instagram pic, adding the hashtags, "#dwts #halloween #teamcrikey."

The Arrow star always goes all out for Halloween and this year was no exception! Haynes shared this pic of himself done up as Ursula the Sea Wtich from The Little Mermaid, with the caption "Poor unfortunate souls."

Beyonce and her friends went all out for singer Ciara's superhero-themed birthday party on Oct. 24. Check out La La Anthony as Wonder Woman, Ciara and Kelly Rowland as Catwoman, and Queen Bey herself as the icy-eyed Storm!

The Dancing With the Stars pro and his girlfriend rocked the red carpet at Maxim's Oct. 24 Halloween party as Kurt Cobain and Courtney Love.

The singer and Scream Queens star showed up as the Hamburgler at the Maxim Halloween party on Oct. 24.

The Scream Queens star turned the red carpet into a catwalk at Maxim Magazine's Halloween party in Beverly Hills, California on Oct. 24. 

No six-pack abs here! The Magic Mike XXL star rocked this paunchy (and kind of weird) Winnie the Pooh costume, and shared the pic on Instagram on Oct. 17, 2015. Channing explained the outfit in the photo caption, writing, "Pretty sure I terrified all the children at our daughter's Halloween carnival today. Btw- I'm pooh bear in case anyone can't tell."

Kim Kardashian and her makeup artist Joyce Bonelli paid homage to the icons in the fashion industry, Vogue in particular. Bonelli went as Vogue's Grace Coddington, while her son Zeplin Black was dressed as Karl Lagerfeld. A nearly unrecognizable Kim dressed as Vogue editor-in-chief Anna Wintour, while her daughter North West went as fashionisto Andre Leon Talley.  

Click the pics for more MUST-SEE Halloween costumes.  

The rapper used Snoop Dogg's diss as inspiration, dressing up as the Wayans brothers' characters from White Girls for a friends Halloween party.

Lambert was a Wolfman for his 2nd annual Halloween bash at Bootsey Bellows in West Hollywood.

Osbourne channeled Margot Tenenbaum, Gwyneth Paltrow's character from The Royal Tenenbaums, for Adam Lambert's Halloween party.

Rihanna and her friends dressed up as Ninja Turtles for a Halloween party in New York City.

The DJ and Jersey Shore star dressed up as Batman for a Halloween gig at The Bank Nightclub inside Las Vegas' Bellagio Hotel.

The singer perfected his "Blue Steel" look as Derek Zoolander at Heidi Klum's Halloween party at TAO Downtown in New York City, sponsored by Svedka Vodka.

The Big Bang Theory's Kaley Cuoco and her husband Ryan Sweeting went for a couple's costume as the on-again, off-again Justin Bieber and Selena Gomez.

Project Runway host Heidi Klum was a vibrant butterfly for Halloween.

Hudson hosted a Sons of Anarchy-themed Halloween party on October 30, 2014 and dressed the part as a leather-clad biker babe.

The musical couple showed up as a pair of vampires to Kate Hudson's Halloween bash.

The Good Morning America host "let it go" as Elsa from Frozen.

The singer posted a picture of his groovy Austin Powers costume on his Instagram page, with the caption "yeah baby."

The Live! with Kelly and Michael hosts dressed up as Jon Snow and Daenerys Targaryen from HBO's Game of Thrones. 

The whole Today Show crew wore Saturday Night Live inspired costumes for their Halloween show!

The actor posted this photo of himself as the Green Lantern to his Instagram, joking, "Since I'm still waiting on that call back audition for the film I might as well use the outfit I bought for the audition for Halloween #HappyHalloween. #StillWaiting"

The Glee star channels a risqué Little Red Riding Hood for Kate Hudson's annual Halloween bash.

Taylor Swift's Halloween costume has been revealed.

Putting a play on lyrics from her song "Blank Space" off her new album 1989, Swift posted on her Instagram on Oct. 31., "Cause, darling I'm a nightmare dressed like a PEGACORN. #HappyHalloween!"

Jessica Alba was ready for a night of rock n' roll when she and her gal pal dressed up as the guys from Guns 'N Roses on Oct. 30, 2014. She Instagrammed of her costume: "#axlandslashforever #welcometothejungle @kellysawyer."

The Arrow star was unrecognizable as Princess Fiona from Shrek at Matthew Morrison's Halloween party in West Hollywood on October 25, 2014.

The expectant actress posted this photo of her clever "bun in the oven" costume to her Whosay page.

McCarthy dressed up as Sandy, Olivia Newton John's character from Grease, for a Halloween party celebrating the launch of her SiriusXM show.

The 30 Rock actress dressed up as a sinister-looking Tinkerbell for DJ Skribble's Fetish & Fantasy Halloween Ball on October 29, 2014.

Electra dressed up as "California Gurl" Katy Perry for SVEDKA Vodka's Halloween Soirée on October 25, 2014.

The Pretty Little Liars star and her Dancing with the Stars counterparts were a couple of black cats at a Halloween party in Hollywood.

The Glee star was fully in character as Grumpy Cat at a party in West Hollywood.

The actress wore a fairy princess costume to a Halloween party in Beverly Hills. 

Double Hefs! The Playboy mogul and his wife dressed up in Hefner's signature red robe and captain's hat for the Playboy Mansion's Halloween bash.

The Glee star strutted his stuff in a crown and sash declaring him "Mr. California" at co-star Matthew Morrison's party on October 25, 2014.

The Mean Girls star and Dancing with the Stars contestant donned a Batman cape and cowl for a Halloween party at Matthew Morrison's house.

Rose dressed up as Married with Children matriarch Peg Bundy for her birthday costume party on October 21, 2014.

Chelsea Handler got pregnant for her 2013 Halloween costume! The talk show host was spotted heading to Kate Hudson's Halloween party in Brentwood, Calif., but first shared this pic, writing: "My Halloween costume. Pregnant and excited about it."

The King of Halloween (three costumes in three days) rocked an super slick suit at his party, powered by CIROC, at Bootsy Bellows on October 31, 2013.

Kelly Osbourne got her father Ozzy's approval for her 2013 Carrie costume. She wrote on Instagram: "Just stopped by to make sure my dad like my costume!!!!! He loved it! Yaaaay."

Sir Patrick Stewart won the Halloween 2013 vote for most delicious costume, dressing up as a lobster. 

In 2013, Heidi Klum posted this photo of her impressive Halloween costume on Twitter.

Models apply makeup to look more youthful, but Klum did the opposite for Halloween, undergoing hours of detailed makeup to become an elderly lady.

Can you recognize her under the disguise?

NPH and husband David Burka always go all-out for Halloween with the entire family dressing up in intricately designed costumes. 2013 was no exception.

"Have a spooktacular night! Here's our family Halloween pic," Harris captioned the photo, posted to Twitter.

Miley Cyrus was a very popular costume for Halloween 2013. Morning show hosts Kelly Ripa and Michael Strahan dressed up as Miley Cyrus and Robin Thicke from their performance at the MTV Video Music Awards.

In 2013, TODAY co-host Matt Lauer channeled Pamela Anderson's Baywatch getup. The show posted the costume on Instagram, writing: "Happy Halloween from @mattlauernbc...aka C.J. from #Baywatch! #HalloweenTODAY #OrangeRoom #MattLauer #Halloween #TODAYshow"

Glee gal Naya Rivera was Carmen Sandiego for Halloween 2013! She said of her costume: "She's sexy AND educational! Just doing my part to teach the kids geography #ms.sandiego."

Full House hunk John Stamos dressed like a devil for 2013's Halloween festivities. 

In 2013, Gisele Bundchen and her hubby Tom Brady dressed up in a classic couples costume: Dorothy and the cowardly lion from The Wizard Of Oz. The supermodel captioned this kiss pic, writing: "Having fun with my Lion last night! #thewizardofoz #Dorothy #2013 #halloween #fun #love."

Jessica Alba and her pals dressed up as the ladies (and gentleman) of the 1987 film The Witches of Eastwick for Halloween 2013. Alba was Cher's character Alexandra Medford.

Martha Stewart showed up as a fairy godmother to Hub Network's First Annual Halloween Bash in Barker Hangar on Oct. 20, 2013 in Santa Monica, Calif.

Nicole Richie explained her 2013 costume on Instagram, writing: "Happy Halloween from your favorite #TWINS Arnold Schwarzenegger & Danny Devito."

Supermodel Alessandra Ambrosio dressed up as the Queen of Hearts in 2013, and captioned one of her Instagram costume pics: "#halloween #2013 #party #funn #aliceinwonderland #queenofhearts"

Supermodel Cindy Crawford and her husband Rande Gerber had a fun couples costume in 2013. Cindy dressed up as Slash from Guns 'N Roses, while her hubby was lead singer Axl Rose.