Kris Kross star Chris 'mac Daddy' Kelly has died at the age of 34. The rapper was found unresponsive at his home in Atlanta, Georgia on Wednesday (01May13) and transported to Atlanta Medical Center, where he was pronounced dead, a representative for the Fulton Country Medical Examiner tells Billboard.com. The cause of death is not yet known and an autopsy is expected to take place on Thursday (02May13). Stars flocked to pay tribute to Kelly as news of his death broke, with Timbaland and Big Boi among the first to offer their condolences. Kelly and his bandmate Chris 'Daddy Mac' Smith were discovered in an Atlanta shopping mall by Jermaine Dupri in 1990 and the hip-hop duo went on to release three studio albums. They are best known for their hit 1992 song Jump, which spent eight weeks at number one on the Billboard Hot 100 and sold more than 100,000 copies as a VHS video single, as well as for wearing their clothing backwards. Kris Kross performed on Michael Jackson's 1992 Dangerous World Tour and even had a cameo in his music video for Jam. They also appeared in promos for Run-D.M.C. and TLC, and featured in an episode of TV sitcom A Different World. Kelly and his bandmate found fame with a new audience in the mid-1990s when they recorded a rap for Nickelodeon kids' cartoon Rugrats - it went on to appear on VHS copies of the show from 1994 and was released on CD in 1998. The duo disbanded after the release of their third album, 1996's Young, Rich & Dangerous, and went on to have solo careers. They reunited earlier this year (13) to perform at a special concert to mark the 20th anniversary of Dupri's label So So Def Recordings. In his personal life, Kelly was an avid kite flyer - he entered several national competitions and was planning to start a kite design company.