Sonu Nigam (Hindi: सोनू निगम; born 30 July 1973 in Faridabad, Haryana, India)is an Indian playback singer whose songs have been featured in numerous Hindi and Kannada movies, as well as films in Tamil, Assamese, Punjabi, Bengali, Marathi and Telugu language. He has also released numerous Indi-pop albums and acted in a few Hindi feature films. He had changed the spelling of his last name from 'Nigam' to 'Niigaam' in accordance with numerology, but could not get desired results, he returned to the old spelling 'Nigam'.

Over the years, Nigam has given concert performances in many countries, including United States, Canada, UK, France, Germany, Belgium, Holland, Spain, Australia, New Zealand, Pakistan, Nepal, Bangladesh, Russia, Afghanistan, UAE, Kuwait, Saudi Arabia, Thailand, Indonesia, Singapore, Malaysia, West Indies, Suriname, Mauritius, Nigeria and South Africa. In May/June 2007, he participated in a star-studded show in North America called "The Incredibles," in which Asha Bhosle, Kunal Ganjawala and Kailash Kher participated. In September and October of the same year, he gave solo concerts titled "Simply Sonu" in Canada and Germany (becoming the first Indian singer to perform in the latter country). In April 2008, he did a marathon of concerts in cities in India, promoting his Punjabi single "Punjabi Please". In November 2007, at the inauguration of Harvard University's 28th president, Dr. Drew Gilpin Faust, Nigam sang Mahatma Gandhi's favorite bhajan, "Vaishnav Jan To Tene Kahiye", with the Harvard College Sangeet. In July 2008, he participated in a three-city tour of the United Kingdom, singing Mohammed Rafi songs with the City of Birmingham Symphony Orchestra. This followed the release of these songs by the CBSO and the Indian music company Sa Re Ga Ma in the album Rafi Resurrected. Amongst several other concerts, he notably participated in a US tour with Sunidhi Chauhan in 2009 called "The Explosion 2009" tour and in a UK tour titled "All Izz Well" in November 2010.