Starring on a hit show where the fashion takes center stage definitely has its advantages, case in point: Leighton Meester, who seems to be getting more glamorous by the day. The Gossip Girl star arrived at the opening of the opera La Fille Du Regiment looking absolutely stunning in a yellow strapless Yves Saint Laurent cocktail dress, standing out amongst a crowd of fashion heavy hitters including Diane Kruger, Naomi Campbell and the Queen of Fashion herself, Ms. Anna Wintour. Click READ MORE to get her shining look!