Rendering an upbeat soundtrack for a film that discusses child labour and rape couldn't have been a mean feat for Shankar-Ehsaan-Loy, the musician trio currently enjoying accolades for their last release, Mere Pyare Prime Minister.

"While we retained the intensity of the music, the message was straightforward. So, even though the title song was breezy, almost happy sounding, the lyrics were grave. This was also the case with the track, Rezgaariyaan, which depicted the sad situation of kids in slums. Gulzar saab [lyricist] refers to them as loose change; the children who people don't bother about. But the song is upbeat; the feel is funky," says Shankar Mahadevan.