Singer KK, who gave Indian music lovers many hits over the last three decades has died at 53, reported Hindustan Times.
He gave a performance at Nazrul Mancha on Tuesday and later went to his hotel where he fell ill.
He was brought to a hospital where he was declared dead, the HT report added.
KK released his first album, Pal in 1999. The singer-composer, whose real name was Krishnakumar Kunnath then focussed more on Bollywood than on his independent music, giving hits such as Tadap Tadap (Hum Dil De Chuke Sanam, 1999), Dus Bahane (Dus, 2005), and Tune Maari Entriyaan (Gunday, 2014).
He was born in Delhi and was also known for his electric live shows.