Ozzy Osbourne is a playable character in Guitar Hero World Tour. In career mode, the player gets to play 2 of his songs (Mr. crowley & Crazy train) were he makes an appearance on stage to be lead singer. He is an unlockable character if his songs are completed in vocal career in the German tier.
History
Ozzy Osborne was the lead singer of Black Sabbath, he was kicked out of the band in 1979 and went on to pursue a successful solo career.