Chris Kelly and Chris Smith, of the rap duo Kriss Kross, made it big with their smash hit Jump. Kelly, left, has died at the age of 34. Rapper Chris Kelly, half of the 1990s kid rap duo Kris Kross who made one of the decade's most memorable songs with the frenetic Jump, has died, according to US authorities. Investigator Betty Honey of the Fulton County Medical Examiner's office said the 34-year-old was pronounced dead about 5pm on Wednesday (Thursday AEST) at the south campus of the Atlanta Medical Centre. Honey said authorities were unsure of Kelly's cause of death and that an autopsy had yet to be performed. RIP