John Michael “Ozzy” Osbourne (3 December 1948 – 22 July 2025) was an English singer, songwriter, and media personality. He co-founded the heavy metal band Black Sabbath in 1968, and rose to prominence in the 1970s as its lead vocalist. During this period, he adopted the nickname “Prince of Darkness“.

The band pioneered heavy metal music, particularly with their critically-acclaimed albums Black Sabbath, Paranoid (both 1970) and Master of Reality (1971).

Osbourne was fired from Black Sabbath in 1979 due to his problems with alcohol and other drugs. He then began a successful solo career with Blizzard of Ozz in 1980 and released thirteen studio albums, the first seven of which were certified multi-platinum in the United States.

In the 1980s, Osbourne drew controversy for his antics both onstage and offstage, and was accused of promoting Satanism by the Christian right.

He reunited with Black Sabbath on several occasions. He rejoined from 1997 to 2005, and again in 2012; during this second reunion he sang on the band’s last studio album, 13 (2013), before they embarked on a farewell tour that ended in 2017.

On 5 July 2025, Osbourne performed his final show at the Back to the Beginning concert in Birmingham amid health issues, having announced that the concert would be his last show. Although he announced intention to continue recording music, he died 17 days later, on 22 July.