People.com's Halloween Party

Your Best Star-Worthy Costumes of 2011

From the Mad Hatter to Justin Bieber, see your star-inspired Halloween costumes

'HOLLABACK GIRL'

"As a huge Gwen Stefani fan, it was an easy decision to go with the 'Hollaback Girl' video look," Jessica F. of Richmond, Va., writes. "My favorite part of the costume was how authentic it was and of course the B-A-N-A-N-A-S down the back!