Black Sabbath's track "Changes appeared on Vol. 4 and always stuck out like a sore thumb, because it was more of a soul song than a metal track. Originally written by bassist Geezer Butler, as he was going through his breakup with his first wife, Ozzy has referred to the song as heartbreaking.
Somehow, soul singer Charles Bradley made it even more depressing-sounding. The cover will appear on Bradley's new album, Changes out April 1, 2016.