The "School of Rock" alum was joined by a band of teenagers, including Tom Morello's so on guitar and Scott Ian's son on bass.

Black Sabbath performed “War Pigs,” “N.I.B.,” “Iron Man” and “Paranoid” — while Osbourne, 76, also performed solo songs such as “I Don’t Know,” “Mr. Crowley,” “Suicide Solution,” “Mama, I’m Coming Home” and “Crazy Train.”

Hours after Lamb of God covered Black Sabbath’s "Children of the Grave" at Ozzy Osbourne’s farewell concert, the band released a studio version of the track.