This is something I never heard in India, which is surprising since it's an A. R. Rahman composition from a movie supposedly released in 2008. But Meherbaan from Ada has got to be one of his finest works in recent times. (Strangely enough, this movie is not even listed on IMDb.)
This is a beautifully written song, into which Rahman's voice breathes life. That's right. It's sung by Rahman, composed by Rahman, and I love it. Do I need to say more?