Shankar Mahadevan and Rahat Fateh Ali Khan sing the newly-recorded brief theme track - an nteresting song written by Gulzar with music by Shankar-Ehsaan-Loy. The rest is a compilation of 20 tracks are Sufi tracks sung separately by Indian and Pakistani artistes. The interesting part is that the range includes film songs from Hum Dono to Hero and other non-film tracks.