The Black Sabbath bassist shared details of Osbourne’s final performance, including how “frail” he had become, in an essay for the Sunday Times. Butler said the iconic rocker needed the assistance of three people while rehearsing and had to sit down while he sang.

Ozzy Osbourne has died at 76, just weeks after his final show with Black Sabbath on July 5. Here's everything to know about the benefit concert and the rocker's parting words to fans from the stage.