Obituary: Wild life of Ozzy Osbourne, rock's 'prince of darkness'

Getty ImagesOzzy Osbourne, who has died at the age of 76, helped forge the sound that became known as heavy metal - and on top of that, the frontman practically invented the image of the wild rock star.Ozzy's band Black Sabbath made an indelible mark on music by pioneering heavy metal - and was hailed as a major influence by a range of artists who followed.With his wailing vocal style and "prince of darkness"…