Ozzy Osbourne's final concert with Black Sabbath raised $190 for charity. Proceeds for the July 5 show benefited Cure Parkinson's (which Osbourne suffers from), Birmingham Children's Hospital, and Acorn Children's Hospice.

"I didn’t realize then that I would never see Ozzy again after that night," Butler writes of the July 5 "Back to the Beginning" show in England.

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.