Sunidhi Chauhan (lang-hi?????? ?????) (born Nidhi Chauhan, August 14, 1983) is an Indian playback singer, best known for her Bollywood film songs. She is credited with over 2000 songs.

Chauhan began to sing at the age of four, and was discovered by a local TV anchor. She won recognition through a televised singing contest, Meri Awaz Suno, which she won, and made her entrance into playback singing with the Hindi film Shastra.

Her breakthrough was Ram Gopal Varmas film - Mast (Mast (film)), in which she sang the hit song, Ruki Ruki Si Zindagi.

She has been nominated for twelve Filmfare Awards, winning it on three occasions. She has also won two Star Screen Awards, two IIFA Awards and one Zee Cine Award (Zee Cine Awards).

Sunidhi Chauhan is a judge on Indian Idol season 5 (Indian_Idol_5).