I found Sonu Niigaam’s voice on the track.

http://portal.arrfansclub.com/2009/03/27/karthik’s-ready-for-the-big-league/

Have you ever recorded for a song only for it to be given to another singer later?
Yes, and I even felt that it was my best song ever. I had sung the track ‘Apne Des Ki Mitti’ for the movie Bose. But when the audio CD released, I found Sonu Niigaam’s voice on the track. I was shocked but I realised that Sonu could hit the high notes really well and probably that’s why he was asked to do it. One has to learn from these experiences and move on.