This is something I landed upon by accident. It's called Kangana, from a movie called The Great Indian Butterfly. Shreya Ghoshal has so beautifully lent her voice to the feelings of a young woman in love. She is one singer who is good with the mainstream Bollywood stuff, but simultaneously also tackles classical tunes with ease. This is one such tune, faintly reminiscent of her work for Devdas, her debut as a playback singer for movies. It has the same wonderful beauty, the same innocent charm, the same romance.
By the way, the rest of the songs in this album are also worth checking out, if you're interested in something slightly offbeat, a fusion of Indian classical with some Western music.