updated 04/14/2008 AT 5:00 PM ET
•originally published 04/14/2008 AT 5:50 PM ET
Gossip Girl’s Leighton Meester celebrated her 22nd birthday Saturday night in true Blair Waldorf fashion. The actress, dressed in a red, one-shoulder Armani mini-dress and Jill Stuart heels, partied with friends (including costars Nicole Fiscella and Sebastian Stan) at New York’s ultra-exclusive Bungalow 8. The birthday girl twirled and spun around the upstairs dance floor overlooking the club’s main room before being presented with a chocolate cake with vanilla icing by Fiscella and a club waitress. Meester sipped champagne as she continued to dance along to Blondie’s “Heart of Glass” and The Foundations’ “Build Me Up Buttercup,” until the wee hours of the morning.
– Tiffany Hopkins