Clockwise from top left: KK, Talal Maddah, Warne Marsh and Bruce Hampton | A wave of tributes have poured in for Indian singer Krishnakumar Kunnath, popularly known as KK, who died at age 53 after a concert in Kolkata on Tuesday. He was rushed to hospital from his hotel at around 10.30pm, where doctors pronounced him dead. KK's death comes following the demise of Edava Basheer, the Malayalam singer who collapsed on-stage during a performance on May 28. Here’s a look at some well-known artists who died while performing on stage.