Marc Malkin & Matthew Morrison
The Glee star is decked out as Andy Warhol and he chats up our own witchy Marc Malkin. See more pics inside the party!
Kyle Richards, Alexia Richards, Paris Hilton & Nicky Hilton
The Real Housewives of Beverly Hills star hosts a Halloween party for her family and close friends.
Jim & Alexis Bellino
"Big Daddy and his Wolfy...I mean wifey!" the Real Housewives of Orange County star tweeted before attending a Halloween party.
John Stamos
A devil costume won't stop us from loving this Full House star.
Kim Richards
The Real Housewives of Beverly Hills star attends sister Kyle's Halloween Party as the one and only Wonder Woman!
Cindy Crawford & Rande Gerber
Dressed as Axl Rose and Slash, the A-list couple enjoy a night out at Mike Meldman's Halloween Bash.
Isla Fischer & Sacha Baron Cohen
Talk about monkeying around! One of Hollywood's funniest couples go all out the weekend before Halloween.
Jenny McCarthy
The View cohost dresses up as Wonder Woman for Svedka's Halloween Bash.
Kurt Russell & Goldie Hawn
In support of Kate Hudson's annual Halloween party, the couple sport costumes similar to Hansel and Gretel.
Fashion Police
Another year, another round of awesome costumes from the gang. We've got Kelly Osbourne as Christina Hendricks, Giuliana as Sofia Vergara, George Kotsiopoulos as Lena Dunham, Joan Rivers as Miley Cyrus and Melissa Rivers as Giuliana. See these costumes in action here!
Martha Stewart
There's no place like Oz for the lifestyle and cooking expert who dressed up as Glinda the Good Witch.
Kelly Osbourne & Matthew Mosshart
The Fashion Police host (dressed as Dame Edna Everage) and her fiancé (dressed as Blossom) enjoy a night out at MAC Cosmetics and Rick Baker's Monster Mash.
2012: Kelly Ripa & Michael Strahan
The costars channel Christina Aguilera and Cee Lo Green on Live With Kelly and Michael.
Gwen Stefani
Take that, Sandy! Gwen's Grease costume paid homage to the storm.
Matthew Morrison
The Glee guy goes gaga at the Patrón XO Café Halloween Party.
Katy Perry & Shannon Woodward
These BFFs payed homage to MTV as Daria and Jane. Whatever. Halloween sucks.
Jenny McCarthy
Va va voom! Jenny McCarthy singled herself out in this little number.
Lauren Conrad
L.C. was practically perfect in every way as Mary Poppins.
LeAnn Rimes & Eddie Cibrian
They go together! LeAnn and Eddie make a pretty convincing Sandy and Danny.
Dwayne "The Rock" Johnson
One thing's for sure, you do not want to make this former pro wrestler mad on Halloween.
Robert Pattinson & Kristen Stewart
The Twilight twosome must not have felt like dressing up. Instead, Robsten just threw on some seriously freaky masks.
Kim Kardashian
Meow, Katwoman! How many Halloween costumes does Kim get? As many as she wants!
Miranda Lambert
A dolla makes her holla! Miranda went for the Grand Supreme this holiday, dressing up as the one and only Honey Boo Boo.
Jessica Simpson, Eric Johnson & Maxwell
Jess shows off her slimmed down figure in her Halloween costume and how cute is her little girl as a baby chick?!