G eezer Butler, the founding bassist of Black Sabbath, revealed how the band’s final concert came together weeks before Ozzy Osbourne ‘s death. In a tribute written for the Times of London, Butler said he was initially taken aback by Osbourne’s appearance when the band came in for rehearsals.

Ozzy Osbourne was known for his wild stage persona and outrageous rock star antics, but behind the scenes, he had a heart of gold, according to his longtime Black Sabbath bandmate, Geezer Butler. In an essay for The Sunday Times,

Ozzy Osbourne left behind a very heavy legacy. Here's a look at his best songs, from Black Sabbath's "Paranoid" to "Crazy Train" and "Mr. Crowley."