There was never anyone like Ozzy Osbourne. And there never will be again. Just weeks after he made his triumphant final live performance as a solo artist and as a member of Black Sabbath, the world suddenly had to contend with the tragic passing of the music and cultural icon. Here, Music Week looks back at the all-conquering, colourful and chaotic career of a man who helped to invent heavy metal. Of course, that was just for starters ...