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.

The performance, called "The Back to the Beginning," will cap off an all-day event featuring sets from several iconic heavy metal acts.

Ozzy Osbourne has announced his final show — and it will feature a reunion of the original lineup of Black Sabbath for the first time in 20 years.

Ozzy Osbourne will reunite with all of the original members of Black Sabbath for the first time in 20 years, in a gig that will be his last and that’s being billed as the “greatest” heavy metal show ever.