Here's a picture of Lady Gaga with Leighton Meester and Penn Badgley on the set of Gossip Girl!
On how Lady Gaga ended up on the set of Gossip Girl:
"What’s a new NYU student to do when she’s no longer queen bee? Work her connections to get Lady Gaga to play a private show, of course! That’s what Blair (Leighton Meester) does in an upcoming episode of Gossip Girl set to air Nov. 16"