Leighton Meester lives a double life: playing Upper East Side's resident Queen Bee and being a pop star in her day-to-day. But on Monday night's episode of Gossip Girl, Leighton's worlds will collide! Just like her songs "Good Girls Go Bad" and "Somebody to Love" were featured on this season's soundtrack, Leighton's latest single "Your Love Is a Drug" will play on the April 12 episode -- so listen for the catchy tune!
One more reason to celebrate for Leighton: today is also her birthday. Happy birthday, Leighton!