I'm really excited about this one. Leighton Meester can sing...unlike the actresses who have previously try to come out with music (cough*Scarlett). There has just been a leak of a song call "Birthday" which is by Awesome New Republic. (Should check them out as well. This is a free download of songs from their album "Rational Geographic Volume 1")
This is the original version of the song "Birthday":
This is the remix with Leighton:
This is another song by Leighton