Elton and Ozzy maintained a friendship spanning decades as legends in their respective musical domains. The Rocket Man hitmaker and the Black Sabbath frontman undoubtedly bonded as survivors of highly publicized, long-term struggles with substance abuse - while also ranking among the world's most celebrated performers.

Rock royalty is paying tribute to Ozzy Osbourne, who died today at 76.

Ozzy Osbourne died on July 22 at 76 years old. Celebs including Jason Momoa, Yungblud, Ronnie Wood and others paid tribute to the Prince of Darkness online.