Leighton Meester hosted a party in the Big Apple for Music Unites and Roger Vivier's new fall-winter collection. The Gossip Girl star was an a "delightful mood," an onlooker says, as she snapped pictures with partygoers. "She was a fantastic hostess." Alexandra Richards deejayed the bash and guests sipped champagne and nibbled on beef tartar, caviar and glitter-coated macaroons. – Jessica Wedemeyer
Leighton Meester Hosts a Fashion-Forward Bash in N.Y.C.
10/27/2011 AT 05:55 AM EDT