Black Sabbath's farewell concert, which included hits like "Iron Man" and "War Pigs," comes as the rocker is living with Parkinson's disease.

A legendary farewell. Black Sabbath reunited for Ozzy Osbourne’s final show with the band at Villa Park in Birmingham on Saturday, and the electric concert featured performances by other rock legends.

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.