Ozzy Osbourne is a musician, songwriter, and actor. He is most well known by his lead vocal role of the band Black Sabbath in the 70s. He first appears in the Season Two episode 'Chef Aid', as one of the performers at the concert. In 'Chef Aid', he wears an oversized coat, black pants, round sunglasses, and a cross on a necklace. In 'My Future Self n' Me' he is seen wearing a black and purple robe. In 'My Future Self n' Me', Stan is seen watching The Osbournes, featuring Ozzy, his son Jack Osbourne, and his daughter Kelly. Osbourne appears on 'Chef Aid: The South Park Album', singing 'Nowhere to Run' with DMX, Ol' Dirty Bastard, and The Crystal Method. He also appeared in the accompanying mockumentary, Chef Aid: Behind the Menu, in which he talked about Chef's influence on his career. (Source: Fandom.com, CC BY-SA)