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.

Check in on your metal friend — they're probably freaking out right now. Alright now! Black Sabbath’s original lineup is coming together to throw one big metal sendoff for legendary frontman Ozzy Osbourne.

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