Sometimes it's easy to assume that all famous people know each other. But until Saturday's (July 5) Back to the Beginning blow-out final show honoring Ozzy Osbourne and Black Sabbath, the Prince of Darkness had never met Guns N' Roses singer Axl Ros e. Despite both men being hard rock royalty, their paths had somehow never crossed.

Ozzy Osbourne played his final concert with his legendary heavy-metal band, Black Sabbath, in Birmingham, England on Saturday. The 10-hour farewell show at Villa Park, titled Back to the Beginning, featured appearances by Mastodon,