The former Black Sabbath frontman has been variously described as a psychopath and Satanist, but his influence on heavy metal has been immeasurable. As a showman, his instincts are nearly as impeccable: his live shows have been overwrought spectacles of gore and glitz that have endeared him to adolescents around the world. Indeed, Osbourne has managed to establish himself as an international superstar, capable of selling millions of records with each album and packing arenas across the globe, capturing new fans with each record.