Celebrity Halloween Costumes 2014!

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Kim Kardashian

Skeletor! The Keeping Up With the Kardashians star donned a tight black body suit with white skeleton paint.

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Kaley Cuoco and Ryan Sweeting

Switcheroo! Cuoco and Sweeting hit Halloween as Justin Bieber and Selena Gomez—with a twist! Cuoco channeled the blonde-mopped pop star, while her husband flaunted it in a long dress and a bra as Gomez on Oct. 31.

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Heidi Klum

The queen of Halloween bashes really spread her wings this year! Klum dressed up as a rainbow butterfly to host her annual fete, this year at Tao Nightclub in New York City.

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Joe Jonas and Zoe Kravitz

Blue steel, baby! Joe Jonas did his best Zoolander in costume as the Ben Stiller character, and Kravitz joined him as a hippie nun.

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Neil Patrick Harris and David Burtka

No wonder they were voted the top celeb family to trick-or-treat with! On Oct. 31, Harris dressed as the Riddler, while Burtka costumed up as the Joker. Their son, Gideon, donned a Batman suit, and their daughter, Harper, channeled Catwoman.

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Gisele Bundchen and Tom Brady

Mother of dragons! Bundchen, alongside Brady and their tots, Benjamin and Vivian, went trick-or-treating on Oct. 31, as a fire-breathing family of four.

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Beyonce

Beyonce and her daughter, Blue Ivy, channeled another royal music family on Oct. 31: the Jacksons! While the powerhouse singer dressed up as Janet Jackson circa her "Rhythm Nation" days, the tot donned Michael Jackson's iconic military jacket.

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Rihanna

Turtle time! The "Diamonds" singer got into the Halloween spirit with her friends, dressing as Leonardo, Raphael, Donatello, and Michelangelo from The Ninja Turtles.

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Kelly Osbourne

Nailed it! Kelly Osbourne put on a blonde bob wig with a red barrette, dark eye makeup, and a brown fur coat to transform into Gwyneth Paltrow's Margot Tenenbaum from the 2001 film The Royal Tenenbaums.

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Demi Lovato and Wilmer Valderrama

And the award for best dressed couple on Halloween goes to! The "Neon Lights" singer and her That '70s Show beau dressed up as Lucy and Ricky Ricardo from I Love Lucy.

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Kendall Jenner and Cara Delevingne

The models got together for a matching video game costume tribute, going as Mario and Luigi from the Super Mario Brothers.

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Courteney Cox and Johnny McDaid

The Cougar Town star and her fiance dressed as the creepy and terrifying doll Annabelle from The Conjuring. Cox coated her face with white makeup and wore a blood-stained white gown, while McDaid went as an equally creepy ventriloquist's dummy. "All dolled up and ready to go out," Cox captioned the pic on Twitter.

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Hugh Grant

Hugh with horns? The British actor suited up for UNICEF's annual Halloween Ball, but looked beastly on the red carpet with a yak head covering his face.

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Lea Michele

The Glee actress (in a wig!) laced up in a Tom Ford bustier, teensy black skirt, and a long red cape to celebrate Halloween as Little Red Riding Hood.

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Gwen Stefani and Gavin Rossdale

Va va vampy! The couple coordinated as bloody vampires to mingle with during Kate Hudson's star-studded Halloween party in L.A.

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Kate Hudson

Mama Anarchy it is! The actress rounded up her all-girl biker gang for her Sons of Anarchy themed Halloween bash.

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Sarah Hyland

The Modern Family star dressed up as Little Orphan Annie opposite a friend, who rocked a Miss Hannigan costume.

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Katy Perry

Looking delicious! The "Roar" singer went as a cheeto (and held a bag of the snack, too!) to attend Kate Hudson's shindig in L.A.

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Alessandra Ambrosio

Meow! The Victoria's Secret model donned a sexy silver kitten outfit while out at Pearl's Liquor Bar in West Hollywood.

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Amber Rose

Telling! Fresh off her split from Wiz Khalifa, Rose wore a corpse bachelorette costume while arriving to a Halloween party in L.A.

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Justin Bieber

The "Boyfriend" singer went as the red Power Ranger with his brother Jaxon.

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Ellen DeGeneres

George Clooney would approve! The comedienne went as the actor's new bride Amal Aladmuddin during her eponymous daytime talk show. She noted that it was her "sexiest" outfit yet.

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Maria Menounos

Time out! The TV personality looked gorgeous as Saved by the Bell's Kelly Kapowski to party at Kate Hudson's annual Halloween party.

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Lily Allen

Making a statement? The British singer went as a doctor while attending Kate Hudson's Halloween party in L.A.

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Taylor Swift

Goddess! The singer dressed up as a pegacorn while visiting The Elvis Duran Z100 Morning Show in NYC. "Cause, darling I'm a nightmare dressed like a PEGACORN. #HappyHalloween!" she wrote via Instagram.

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Jessica Alba

The actress and her friend went as Slash and Axl Rose, respectively, to Kate Hudson's holiday bash in L.A.

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Rachel Zoe

The celebrity stylist and her husband Rodger Berman got in the Halloween spirit while attending Kate Hudson's bash.

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Kelly Ripa and Michael Strahan

These two! The Live! With Kelly and Michael co-hosts went as Kim Kardashian and Kanye West from their May 2014 Florence, Italy nuptials.

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Good Morning America

The morning news team donned several costumes for Halloween, including Prince George, Frozen's Elsa, Maleficent, and George Clooney and Amal Alamuddin on their wedding day.

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Hilary Duff and Mike Comrie

Tooth cute! Friendly exes Duff and Comrie hit the town (holding hands!) on Oct. 24 as the tooth fairy and Tony Stark.

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Gerard Butler

Captain Handsome! Gerard Butler donned a Captain America costume as he attended George Clooney, Rande Gerber, and Mike Meldman's annual Casamigos party in Beverly Hills on Friday, Oct. 25.

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Colton Haynes

Haynes dressed up as Shrek’s green-skinned princess, Fiona, on Oct. 25, in West Hollywood. "The most beautiful man in the world ...was the most unfortunate looking woman last night. @coltonlhaynes hahahah I love you," joked Lucy Hale, who partied with the actor that night, on Instagram.

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Ashley Madekwe

The Revenge alum played The Joker in a nurse outfit and an extra-wide smile at Matthew Morrison's 5th Annual Halloween Party in L.A. on Oct. 25.

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AJ Michalka and Aly Michalka

The singing sister duo dressed up as characters from Valley of the Dolls at Matthew Morrison's Halloween bash on Oct. 25.

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Audrina Patridge

The Hills alum flaunted her abs in a sheer costume embellished with turquoise jewels at a West Hollywood bash on Oct. 25.

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Bryan Fox, Perrey Reeves, and Aaron Fox

Superheroes to the rescue! The cozy trio stepped out to Hyde Los Angeles on Oct. 25 dressed as Batman, Batgirl, and Robin.

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Chace Crawford

He does whatever he feels like he wants to do, gosh! Crawford stepped out to Matthew Morrison’s party on Oct. 25, dressed as Napoleon Dynamite's mustachioed Uncle Rico. 

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Rande Gerber and Cindy Crawford

The supermodel and her husband went totally '70s for the Casamigos Tequila party on Oct. 25. "Early Halloween! #cher and #gregallman," Crawford wrote on Instagram.

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Farrah Abraham

The Teen Mom star dressed up as Glinda the Good Witch at the Los Angeles Hustler store on Oct. 25.

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JC Chasez

'N Sync special! Chasez dressed as gonzo journalist Hunter S. Thompson to join former bandmate, Joey Fatone, at a Beverly Hills fete on Oct. 25.

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Joey Fatone

The former boy bander swung into a Beverly Hills party on Oct. 25, as Spider-Man!

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Jonathan Bennett

The Dancing With the Stars contestant didn’t let his Oct. 20 ousting get him down when he stepped out as Batman on Oct. 25, in Los Angeles.

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Josh Beech and Shenae Grimes

Grimes and her husband spooked as retro ghouls on Oct. 25, in Los Angeles.

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Lucy Hale

Tweet, tweet! The Pretty Little Liars star looked blue (but only literally) as a Twitter bird in head-to-toe aqua, a costume made complete by giant white wings and yellow boots as bird feet.

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Matthew Morrison and Renee Puente

The newlyweds—they just tied the knot on Oct. 18—hosted Morrison's annual shindig on Oct. 25, dressed as Pulp Fiction characters Vincent Vega and Mia Wallace.

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Michelle Trachtenberg

Zombie life! The Gossip Girl alum added blood to her '40s-inspired getup as the infamous Black Dahlia for a private party in Beverly Hills on Oct. 25.

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Molly Sims

Pretty in pink! The pregnant-again model and designer looked every bit the disco queen in a hot pink '70s jumpsuit and a matching fuchsia wig at the Casamigos Tequila party on Oct. 25.

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Paris Hilton

Give a mouse a costume! Hilton paid tribute to the Disney icon in a black bustier, polka-dotted skirt, and bow-topped knee-highs, and of course, ears, for Mike Meldman's Halloween party on Oct. 25.

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Janel Parrish and Val Chmerkovskiy

The Dancing With the Stars duo wore matching cat costumes—and shared a smooch!—in Beverly Hills on Oct. 24.

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Maria Menounos

Maria's Wigging Out! Maria Menounos was unrecognizable as she donned a blonde wig and paratrooper costume while attending George Clooney, Rande Gerber and Mike Meldman's annual Casamigos party in Beverly Hills on Friday, Oct. 25.

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Britney Spears and Jeff Beacher

Britney Spears cozied up to Jeff Beacher at the MGM Grand's Beacher's Madhouse after her sold-out Halloween show in Las Vegas.