Singer Sonu Niigaam says he still has much to learn. Niigaam, 33, is regarded by many filmmakers as one of the best male singers in Bollywood.

Niigaam has had dozens of hits since he began singing as a teenager, but said he doesn't feel like he's reached the height of his career.

"I was very ambitious in my late teens and early 20s to establish myself as a singer, but I feel I have much more to learn," Niigaam was quoted as saying by a newspaper.

"If I feel that I have reached the pinnacle, then I will lose everything I have achieved so far," Niigaam added.

Niigaam's range is wide, he has sung religious songs, hip-hop numbers, children's songs and soft romantic melodies.

The biggest hit albums of the year so far Fanaa, and Kabhi Alvida Na Kehna, feature his work.

Niigaam recently changed his name from "Nigam," saying the move will bring him luck.