Best Celebrity Halloween Costumes of 2013

Leave it to newlyweds Dax Shepard and Kristen Bell to have the most Halloween fun! Bell dressed up as Game of Thrones' Daenerys Targaryen this year, while Shepard went as Khal Drogo. And clearly, the costumes were planned well in advance. "I fully realize I'm two years late, and I'm not going to apologize for it, but I think I'm going to be Khaleesi from Game of Thrones," Bell told Huffington Post in October about her holiday dress-up plans. "It's mainly revolving around the fact that Dax wants to be something shirtless, so Drogo is his main pick." 

Beyonce put her halo on for Halloween!

Chelsea Handler got pregnant for Halloween! The Chelsea Lately host was spotted heading to Kate Hudson's Halloween party in Brentwood, Calif. on Oct. 27, 2013, but first shared this pic, writing: "My Halloween costume. Pregnant and excited about it."

Alyson Hannigan and her husband got creative this Halloween. The couple dressed up as leprechauns and had their daughters dress up as a rainbow and a pot of gold.

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

David Arquette got goofy for a Halloween party, dressing up as Bozo The Clown.

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

Demi Lovato hosted her own Halloween party and it got gory. The X Factor judge said of her frightening costume on Instagram: "This is real, this is me, I'm exactly where I'm supposed to be now....."

Sir Patrick Stewart wins for most delicious costume, dressing up as a succulent lobster.

Sandra Bullock and Melissa McCarthy made quite the on-screen duo in The Heat and now they're at it again off-screen on Halloween. 

The two dressed up as matching fisherman as they took their children trick-or-treating in Los Angeles.

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 his partner David Burka went all-out this Halloween with the entire family dressing up in intricately designed costumes. 

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

Talk-show host Ellen DeGeneres got dressed up as the scantily-clad rapper Nicki Minaj. Posting on Twitter, Ellen simply wrote: "Trick or treat."

Morning show hosts Kelly Ripa and Michael Strahan dressed up as Miley Cyrus and Robin Thicke from their performance at teh 2013 MTV Video Music Awards.

Mistresses star Alyssa Milano and her little one had a Peter Pan Halloween!

Good Morning America gals Lara Spencer and Robin Roberts dressed up for Halloween morning. Spencer was a member of Duck Dynasty while Roberts dressed as Oprah Winfrey from The Butler.

The Talk went to Neverland for their Halloween show and Julie slipped into Tinkerbell's wings! To see what Sheryl Underwood, Sara Gilbert, Sharon Osbourne and Aisha Tyler wore, click here! 

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"

Miley Cyrus channeled rapper Lil' Kim's style, tweeting: "Happy Halloween @LilKim."

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

Christina Milian was anything but invisible in her camouflage costume.

Full House hunk John Stamos dressed like a little devil. 

Modern Family star Jesse Tyler Ferguson captioned this pic, writing: "Batman married Robin! #Halloween"

Vanessa Hudgens looks a little spooked in this pic. She captioned the photo, writing: "My manager Evan crossed over to the dark side #springbreakers #alien #gaaaangstaaaa"

Revenge star Ashley Madekwe and her husband Iddo Goldberg had some high-fashion Halloween costumes (Chanel's Karl Lagerfeld and his cat). Ashley wrote on Instagram: "Karl & Choupette."

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. Alba was Cher's character Alexandra Medford.

How I Met Your Mother star Neil Patrick Harris Instagrammed this pic of his husband, David Burtka, and kids, Gideon and Harper, in their Halloween costumes. The Alice in Wonderland-inspired ensembles weren't the final looks for the costume-loving family. "10/31 will be frighteningly different," he wrote/warned.

Paris Hilton is ready to twerk. The Simple Life star donned Miley Cyrus' getup from her stint on the 2013 MTV Video Music Awards, posting on Instagram: "Like my Miley costume? #Halloween."

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.

Jersey Shore stars Jennifer "JWoww" Farley and Nicole "Snooki" Polizzi chose some rather conservative, yet royal, costumes for their Snooki and JWoww Halloween Event: Night Of The Living Drag on Oct. 25 in New York City.

Cindy Crawford and her husband Randy Gerber dressed up as Grease couple Sandra Dee and Danny Zuko. The supermodel wrote on her Facebook: "#ThrowbackThursday: Rande and I about ten years ago as Danny and Sandy from Grease at Herb Ritts' Halloween party! Happy Halloween!"

Playboy mogul Hugh Hefner and Crystal Harris recreated Miley Cyrus and Robin Thicke's 2013 MTV Video Music Awards stage styles for Halloween. Hefner simply tweeted: "#twerk."

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

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

Curb Your Enthusiasm star Larry David dressed up as a conjoined twin with his friend. The best part of this clever costume is that it just required an over-sized sweater and huge scarf. 

Former 90210 star Jessica Lowndes had one sexy Halloween. She wrote on Instagram: "Poison Ivy! #batman #redhead #facepaint #halloween #selfie"

George Clooney's ex Elisabetta Canalis was Wonder Woman for Halloween. The Italian supermodel wrote on Instagram: "#halloween 2013 #Wonderwoman e' pronta per salvare il mondo stanotte! Wonder woman is ready to save the world tonight!"

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

Miley Cyrus tried on some "wigzzzzzz" for Halloween.

Sacha Baron Cohen and his wife Isla Fisher were unrecognizable in their peculiar getups.