The former Black Sabbath frontman's unpredictable spirit wasn’t just limited to interviews, either. Osbourne delighted in showing up where you least expected him, like lending his voice to the Trolls: World Tour cast roster as the gravel-throated King Thrash, proving he could still bring the heavy even in animated form.

Osbourne preceded the Black Sabbath performance at Back to the Beginning with a set featuring members of his past solo bands. He played "I Don’t Know," "Mr. Crowley," "Suicide Solution," "Mama, I’m Coming Home" and "Crazy Train."