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

JUSTIN BIEBER

Jamie Weil caught a case of Bieber fever, donning a "combover wig, sunglasses, long sleeve hoodie with a puffy black vest, skinny jeans, chain necklace and high-top 'old school' kicks."