Gossip Girl's Leighton Meester has teamed up with Cobra Starship for the song "Good Girls Go Bad", and here's the video for you to check out! For all of you that are curious why brunette Blair has lightened up, Leighton's been filming a movie, and went back to her natural blonde hair colour for the role. It's an upbeat song, but I'd like to know what you think of Leighton's step into the music world. So, will you spin or sling the track? Let me know!