Isaac Hayes was a singer/songwriter who-along with writing partner David Porter- powered the soul sound of Stax Records. In the 1960s Hayes began showcasing his own deep-textured voice, recording successful solo albums, including Hot Buttered Soul and Black Moses, which earned him a Grammy in 1972. That same year he won an Academy Award for "Theme from Shaft." Outside of music, Hayes also ventured into film and TV, including lending his voice to the character Chef on the popular adult cartoon, South Park. After suffering a stroke, Hayes died in 2008.