Jun 14, 2011 01:30 PM
Monday night, Gossip Girl Leighton Meester sang at the Troubadour in West Hollywood and co-star Michelle Trachtenberg stopped by to enjoy the show ... and hopefully not gossip about it.
Leighton is working to cultivate herself as a double threat -- she sang in the flick Country Strong and has collaborated on tracks with other artists.
The two were all smiles -- Leighton was especially bashful in front of the cameras as a mystery man tried to hide her face. Check out the pics in our gallery below and our video after the jump!
SEE THE GALLERY Leighton Meester Is Camera Shy
Leighton Meester Ducks For Cover In New Boyfriend Adam Brody's Back Seat
Leighton Meester Makes Out With A Girl In Sexy Music Video
Leighton Meester And Penn Badgley Share A Kiss On The Set Of Gossip Girl
Leighton Meester's Legal Drama With Mom Comes To An End
Leighton Meester Snaps Up $1.5 Million Pad In The Valley