With the exception of instrumental tracks, there are a total of 20 songs from Sabbath's albums with Osbourne that never made the cut live, according to Setlist.fm. Therefore, there may have been a time where a song was played for a specific event that wasn't a concert.

Ozzy Osbourne has announced he will reunite with his Black Sabbath bandmates for one final performance later this year. But who is the rock singer and how did he rise to fame?