Emily Van Camp
The Revenge star put on her tiger stripes to celebrate Halloween at Hyde Lounge in Los Angeles.
Lance Bass
The boy-bander clowns around at Fred & Jason's Halloweenie party in L.A.
Sean "Diddy" Combs
This rapper took on the legendary singer Prince while partying at the Playboy Mansion.
Neil Patrick Harris
This sexy daddy Dracula wants everyone to know he's been doing his reps at the gym. Drooly Duly noted.
J.Woww & Roger Matthews
Nerd alert! The engaged Jersey Shore couple celebrate Halloween early at Chateau Nightclub in Las Vegas.
Zachary Quinto
"Wasn't going out as of ten minutes ago. a little proud of what i threw together. i am fireworks on the fourth of july." the Heroes star tweeted.
Melissa & Joe Gorga
The Real Housewives of New Jersey couple spice thing up with red hot devil ensembles.
Kim Kardashian
The E! star let fans in on her costume hunt, tweeting this sexy photo with the caption, ""Rawwwr!!! Halloween Costume shopping."
Heidi Klum
The golden model mama gives us a preview of what she'll be wearing at her 13th annual Halloween party this year.
Paris Hilton
The heiress lays down the law.
Padma Lakshmi
The Top Chef star shows off her witchy side while hosting the 11th Annual Dream Halloween event in New York.
Ellen Barkin
It's Halloween time on the set of The New Normal!
Cat Gray, Wayne Brady, Tiffany Coyne & Jonathan Mangum
The crew of Let's Make a Deal gets decked out for a special Halloween edition with hippies, hip hop and Star Trek.
Drew Carey & Wendy Makin
Carnival day on The Price Is Right means top hats, bowties and canes!
Justin Bartha
The actor is getting into the game on the set of The New Normal.
Bridget Moynahan & Sami Gayle
I'll get you, my pretty! The Wicked Witch and Dorothy from The Wizard of Oz are getting along for Halloween on Blue Bloods.
Simon Helberg & Melissa Rauch
It's Smurf and Smurfette! The duo go all out in costume on The Big Bang Theory.
Scott Caan
The star shows us his guns on an episode of Hawaii Five-0.
Beyoncé
The mom-to-be is simply bee-utiful as she attends Kanye West's shindig in NYC.
Miley Cyrus
The teen star rocks some fierce makeup, a spiky collar and some sexy cleavage at a Halloween bash in Hollywood.
Miranda Kerr
Is it any wonder that the supermodel served as ringmaster at the Sexy Circus Halloween Party in the Big Apple?
Heidi Klum & Seal
The adorable duo monkey arround at Heidi's 12th Annual Halloween Party in New York.
Zac Efron
Who wears short shorts? The former High School Musical star, who's doing his best Reno 911 impression.
Holly Madison
Minnie Mouse gets a sexy revamp by the former Girls Next Door star.