Indian Idol 5 is lucky to have a great female singer like Sunidhi Chauhan on the judges' panel. She has an amazing voice and awesome vocal skills.
Despite having no formal training whatsoever, Sunidhi has trained her voice so well that she can adopt styles as various as classical and hiphop. This is the result of great dedication and hard work, which she has put in since she was just four years old! She was just a girl of 12 or 13 when she won the Meri Awaz Suno contest, judged by classically trained greats like Manna Dey, Lata Mangeshkar and Pandit Jasraj. There were people twice and thrice her age in the competition, but Sunidhi won and got Lataji's blessings.
In a music world dominated by thin, sugary sweet female voices, Sunidhi was the first to break the mould with her more bassy voice and sing mainstream Bollywood songs. Her versatile voice allows her to sing all kinds of songs (literally all kinds!) and for every heroine! There is no doubting her capability. If anything, her songs have not done justice to her ability - she can reach even greater heights if given the chance. Having sung for music directors like Anu Malik, Vishal-Shekhar, Pritam, Salim-Sulaiman, A R Rahman and Ismail Darbar, she is continuously exploring newer facets of her voice.
More power to you, Sunidhi!