Posted on Tue Jun 14th, 2011 1:30pm PDT
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
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