It's Halloween! Time for some costume frenzy!
Kim Kardashian showed up in a mermaid costume along with a $2000 worth of wig (seriously?!), accompanied beau Kanye West as her sailor
Kanye West and Kim Kardashian
Emma Roberts took notes from aunt Julia Roberts by dressing up as Pretty Woman. Must say, she's pulling it off!
Jessica Alba arrived with hubby and daughter as The Incredibles
Jessica Alba with husband and daughter
Diddy showed up as the one and only Prince.
Glee's Chord Overstreet was almost unrecognizable dressed up as vintage Brad Pitt.
Ryan Seacrest and gilfriend Julliane Hough dressed up as infamous couple Bonnie and Clyde. Julliane looked beautiful, don't you think?
Ryan Seacrest and Julliane Hough
Matthew Morrison showed up as doppleganger, Justin Timberlake vintage self from the 'Bye, Bye, Bye' video, complete with the face mike. Co-star Diana Agron on the other hand, chose to be Tweety this year.
Matthew Morrison and Diana Agron