John Michael "Ozzy" Osbourne (3 December 1948 – 22 July 2025) was an English singer, songwriter, and media personality. He rose to prominence during the 1970s as the lead singer of the heavy metal band Black Sabbath, during which period he adopted the nickname "Prince of Darkness".

Osbourne became a founding member of Black Sabbath in 1968, providing lead vocals from their eponymous debut studio album in 1970 to Never Say Die! in 1978. The band was highly influential in the development of heavy metal music, in particular their critically acclaimed releases Paranoid (1970), Master of Reality (1971), and Sabbath Bloody Sabbath (1973). Osbourne was fired from Black Sabbath in 1979 due to problems with alcohol and other drugs. He then began a successful solo career with Blizzard of Ozz in 1980 and released 13 studio albums, the first seven of which received multi-platinum certifications in the US. He reunited with Black Sabbath on several occasions. He rejoined in 1997 and helped record the group's final studio album, 13 (2013), before they embarked on a farewell tour that ended with a 2017 performance in their native Birmingham.