See the stylish, sexy and outrageous costumes as the stars hit the set
Updated: Friday Oct 01, 2010 | 05:00 PM EDT
By: Christie LaRusso
More from PEOPLE
See More News
4 of 31
A mask can't hide this belle of the ball, as the Gossip Girl's favorite socialite lights up the TV show's N.Y.C. set in layers of blue chiffon and sequins from Carolina Herrera.
Copyright © 2014 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.