Tributes are pouring in from music legends and celebrities after Ozzy Osbourne, the rock and heavy metal icon turned reality show star, has died at the age of 76, according to his family.

Ozzy Osbourne has been remembered as a “pioneer,” a “fearless talent” and a “dear friend,” in an outpouring of tributes from fellow musicians and his former Black Sabbath bandmates following his death on Tuesday at the age of 76.

Ozzy Osbourne, the storied Black Sabbath lead singer known as much for his excesses and bizarre onstage antics as his pioneering heavy metal music, has died in London. Bedeviled by health issues for years, Osbourne died Tuesday morning, his family announced, according to the Associated Press. He was 76.