Their huge farewell concert, dubbed ‘Back To The Beginning’, will be held at Villa Park in Birmingham on Saturday (July 5)
Osbourne made the comments on his podcast ahead of Black Sabbath's final show on July 5
The guitarist was among the first wave of artists announced for the metal icons' final gig
"Rehearsals are underway"
The cans are going for $450 a piece
It is not yet known which artist has been axed from the huge event
The star-studded metal event takes place next month
“It was probably the worst way I’ve felt in years”
The show will also have performances from Metallica, Slayer, Pantera, Gojira, Smashing Pumpkins‘ Billy Corgan, Slash and more
The appearance will come just days after Black Sabbath's landmark ‘Back To The Beginning’ show