John Michael "Ozzy" Osbourne, the frontman of English heavy metal band Black Sabbath, passed away on Tuesday at the age of 76.

Nicknamed the "Prince of Darkness" and the "Godfather of Heavy Metal," Osbourne is largely credited with founding the heavy metal genre.

Though he parted ways with Black Sabbath in 1979 over his drug and alcohol addictions, he rejoined the band several times, including for a farewell live performance last month.