Ozzy Osbourne passed away at 76, just weeks after his final Black Sabbath concert. Learn more about the health complications that led to his death and the official cause here.

Ozzy Osbourne's cause of death has been revealed. The Black Sabbath rocker died at age 76 from a heart attack, according to his death certificate obtained by The New York Times and The Sun. The death certificate reportedly listed Osbourne's cause of death as "out of hospital cardiac arrest,

I was so lucky and blessed to be apart of a very small group that got to call him Dad,’ Jack wrote on Instagram