Leighton Meester is On with Alexa Chung

Leighton Meester dresses up in a pretty Thakoon dress as she heads to MTV Studios to tape her appearance on It’s On with Alex Chung in New York City’s Times Square on Thursday afternoon (June 25).

The 23-year-old Gossip Girl sweetheart finished off her look with Louboutin lace-ups and Tod’s D-bag. Hot!

On the show, Leighton and pop punk band Cobra Starship previewed their new music video, “Good Girls Gone Bad.” Video preview below! Preview pics from the video shoot are here.

10+ pictures inside of Leighton Meester on Alexa Chung…