LOS ANGELES, Calif. -- Leighton Meester's talents don't just end at playing 'Gossip Girl's' Blair Waldorf. The actress debuted a new single, 'Somebody To Love,' featuring Robin Thicke on Tuesday. Leighton has already proved she has vocal chops thanks to her part on the Cobra Starship song, 'Good Girls Go Bad,' and she's back with another potential hit.