Sarah Hyland
The Modern Family star expresses her love for The Walking Dead in her intimidating costume.
Patrick Stewart
Something about Sir Patrick Stewart as a lobster in a tub makes us extra happy!
Mandy Moore & Ryan Adams
Since they are the Adams it only makes sense the couple would dress up as the Addams Family.
Jesse Tyler Ferguson
The Modern Family star and his partner Justin Mikita do their best impression of Batman & Robin!
Shenae Grimes, George Kotsiopoulos, Christina Milian & Jenna Ushkowitz
The spirited foursome attend the third annual Midori Green Halloween Event at Bootsy Bellows in Los Angeles.
Hilary Duff & Mike Comrie
Hilary leaves Lucas at home for this Halloween party in Beverly Hills where she dresses up as a sexy mouse.
Queen Latifah
It's Halloooowwweeennnn! The talk show host pays tribute to Oprah Winfrey on her holiday themed episode.
Vanessa Hudgens
Doesn't the Spring Breaker make a cute angel out at Beverly Hills Halloween Party?
Naya Rivera
Blast from the past! The Glee star heads back to the 90's with her Carmen Sandiego costume at Kate Hudson's holiday party
Adam Lambert, Lance Bass, Michael Turchin & Jai Rodriguez
We're loving Lance and his fiancé's Wayne's World costumes. And Adam Lambert doesn't doesn't make a bad genie, either!
Kristin Chenoweth & Chris Colfer
Sexy R2D2?! Who knew that could work? See more pics from Matthew Morrison's party!
Hugh & Crystal Hefner
The Playboy mogul sports a striped blazer in honor of Robin Thicke, while Harris does her best Miley Cyrus impression.
Bethenny Frankel
On her Halloween episode, the Bethenny host creates her very own Candyland on set.
Tom Brady & Gisele
The football player and supermodel are adorable in their Wizard of Oz costumes.
Paris Hilton
Sorry Paris, but you aren't the only one to rock a foam finger for Halloween. Joan Rivers and Crystal Harris also sported the popular costume.
Lea Michele
For Kate Hudson's Halloween bash, the Glee star rocks a classic Bavarian dress. Goldie Hawn actually showed up in a similar costume!
Alessandra Ambrosio
The Victoria's Secret model shows off her healthy figure as the Queen of Hearts.
Nicole Richie
We gotta hand it to Nicole Richie—this Twins costume is adorable!
Josh Duhamel & Fergie
In the first of many costumes, the new parents decide to commemorate Halloween and The Day of the Dead (or Dia De Muertos) together.
Fergie & Josh Duhamel
Fergs and Josh really went all out for their second Halloween costume of the season with their Elvira and Riff Raff looks.
Lydia & Doug McLaughlin
Quack! Quack! The Real Housewives of Orange County stars take their Duck Dynasty themed costumes to a whole new level.
Ryan Seacrest
The American Idol host keeps his costume simple with a "Phantom of the Opera" mask.
Ariana Grande
We love "The Way" Ariana celebrated Halloween on set.
Lauren Conrad & William Tell
The newly engaged Hills star and fiancé dress to impress at Matthew Morrison's Halloween Party.