Home Shock G and Tupac Shakur of Digital Underground Live performs at Market Square Arena in Indianapolis, Indiana in July 1990. (Photo By Raymond Boyd/Getty Images) Shock G and Tupac Shakur of Digital Underground Live performs at Market Square Arena in Indianapolis, Indiana in July 1990. (Photo By Raymond Boyd/Getty Images)

Shock G and Tupac Shakur of Digital Underground Live performs at Market Square Arena in Indianapolis, Indiana in July 1990. (Photo By Raymond Boyd/Getty Images)

INDIANAPOLIS – JULY 1990: Rappers Humpty Hump and 2 Pac of Digital Underground performs at Market Square Arena in Indianapolis, Indiana in July 1990. (Photo By Raymond Boyd/Getty Images)

Digital Underground, group portrait, at Berlin Hip Hop festival, Germany, 1989. (Photo by Rico D’Rozario/Redferns)
Shock G aka Humpty Hump of the alternative rap group Digital Underground performs at Krush Groove 2011 sponsored by radio station 93.5 KDAY At The Gibson Amphitheatre on April 29, 2011 in Los Angeles, California. (Photo by Earl Gibson III/Getty Images)