Shock G, famous for Digital Underground's hit song "The Humpty Dance" and his work with Tupac Shakur, is dead.
The rap legend was found dead Thursday in a hotel room in Tampa ... according to his father, Edward Racker.
We're told the cause of death is unclear but there were no signs of trauma. Shock's father says authorities will conduct and autopsy.
Shock G was the lead singer for the pioneering hip hop group Digital Underground, and he gets into character as his alter ego, "Humpty Hump," for the group's famous 1989 song and dance.
Shock was also known for his collabs with 2Pac ... he's featured on Pac's 1993 song "I Get Around" and he was one of the producers on Tupac's 1991 debut solo album, "2Pacalypse Now."