In an essay for The Sunday Times, Butler revealed that in real life, Osbourne was the opposite of his onstage madman persona. “To me, Ozzy wasn’t the Prince of Darkness — if anything, he was the Prince of Laughter. He’d do anything for a laugh, a born entertainer,” Butler wrote.

Osbourne, who battled Parkinson’s before his death, sat onstage in a black leather chair as he performed for the 42,000-person crowd. He sang five songs by himself, before he was joined by his former bandmates for four Black Sabbath songs.

Black Sabbath star Geezer Butler recalled the first time he met Ozzy Osbourne, who showed up at his front door in an unusual outfit