Halloween!

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!

Emma Roberts

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.

Diddy

Glee's Chord Overstreet was almost unrecognizable dressed up as vintage Brad Pitt.

Chord Overstreet

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