Taylor Momsen set of Gossip Girl in New York City on Wednesday (August 5).

Taylor Momsen works out a short, two-toned hip-hugging dress and shows off her legs for days on the set of Gossip Girl in New York City on Wednesday (August 5).

The 16-year-old aspiring rocker has been working with a few new members of the cast, including Hilary Duff and Tyra Banks!