For more than four decades, as lead singer of the band Black Sabbath, and latterly as a solo artist, Ozzy Osbourne — who has died aged 76 — ­pioneered the outrageous heavy metal lifestyle: drink, drugs,

But no one was more surprised at the success of what became Black Sabbath than Ozzy himself. Ozzy, who died this week at the age of 76, once said the thing he was most proud of was that his band was not the creation of some music mogul.