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.

The Black Sabbath singer and Guns N' Roses frontman's first meeting after respective years in the industry shocked fansNEED TO KNOWOzzy Osbourne revealed that he and Axl Rose met for the very first time at Black Sabbath's final concertFans were surprised to learn that the respective legends hadn't crossed paths until recentlyThe Back to the Beginning concert marked the first time Black Sabbath performed together in 20 yearsOzzy Osbourne is still making new friends after decades as a heavy metal icon.

Ozzy Osbourne and Black Sabbath both bade farewell, performing in their Birmingham hometown at their Back To The Beginning extravaganza, which will presumably be their final concert. Many of the biggest names in the metal world gathered to pay tribute,