Leighton Meester Celebrates Robin Thicke's New Record

Leighton Meester (in Mark Fast) joins Robin Thicke on stage during his album release party for Sex Therapy at NYC’s Butter on Monday night (December 15).

During the Svedka-sponsored party, the 22-year-old Gossip Girl actress performed “Somebody to Love” with Robin and sampled his album for guests in attendance.

Leighton had a blast co-hosting the Y100 Jingle Ball in Miami and plans to come back before the end of the year!

“Yesterday’s show in Miami was incredible. Thank you!!” she tweeted. “I’ll be returning later this month because I love you sooo much.”

10+ pictures inside of Leighton Meester at Robin Thicke‘s album release party…