One of my favorite songs from the soundtrack of Jannat is Judai (by Kamran Ahmed.)… I was watching the idiot box the other day and there were interviews with the makers of the movie and they were talking about this song.
Turns out they(the music company) invite Pakistani musicians(not sure if its limited to them though) to send in their tracks, they then listen to them and pick the ones they like for the movie! Judai was one such classic find, the guy in the interview as so excited telling the story of how they got the song! Makes sense the song is really beautiful!