Sunidhi Chauhan was the winner of the show Meri Awaz Suno on DD when she was 12 years old. I remember following that show back then in the mid 90s and was hosted by Anu Kapoor (I think). It was one of the first reality singing shows and easily on the best till date.
She was heads and shoulders above the competition and defeated a lot of older people. She was a cute little girl but had a grown-up,very mature voice even back then.
Found a youtube clip of her singing.