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.

They created some incredible songs during their run but there's one Black Sabbath song that Ozzy Osbourne considers to be their most important

Heavy metal star Ozzy Osbourne reveals the date for his final show, which will also reunite the founding members of Black Sabbath after 20 years.