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 he will reunite with Black Sabbath for his final- ever concert, which will also feature Metallica, Slayer and more

A year ago, following numerous fits, starts, and cancellations, Ozzy Osbourne revealed he could no longer tour due to lingering health maladies, although he said he wanted to do one last show in his hometown of Birmingham, England, to end on a high note.