Sonu Nigam is an Indian singer whose songs have been featured mainly in Kannada, Hindi, Punjabi and Marathi. He has released Indian pop albums and acted in a few movies. Nigam began his singing career at the age of four, when he joined his father Agam Kumar Nigam on stage to sing Mohammed Rafi's song "Kya hua tera wada". From then on, Nigam accompanied his father on his singing appearances at weddings and parties. He moved to Mumbai with his father to begin his Bollywood singing career at the age of 18. He was trained by Hindustani classical singer Ustad Ghulam Mustafa Khan.