Gossip Girl star Leighton Meester kept it fun, playful and gorgeous in a Louis Vuitton dress at the “Model as Muse: Embodying Fashion” Costume Institute Gala at The Metropolitan Museum of Art in New York City on Monday evening. Talk about colorful!

Meanwhile, co-star Blake Lively showed off a bit of a leg and more in a stunning teal Versace gown (and Chanel Beauté makeup) at the fashion extravaganza.

Here are our girls at the event ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.