Leighton Meester wore a very sexy jumpsuit to a Harry Winston event in New York City last night.  The jumpsuit was from Marchesa’s Spring 2011 collection.  It is a black peek-a-boo sheer lace piece with a plunging V-neckline.  This was the exact opposite of the modest look worn by the Gossip Girl to an event the evening before.  Her makeup was dramatic this evening, including bold red lips.  Leighton accessorized her look with a pair of black peep-toe shoes that imitated the neckline of her garment, a silver evening bag and of course, Harry Winston diamonds.