Rock wildman Ozzy Osbourne ravaged his body so badly with drink and drugs, doctors wrongly diagnosed him with Aids.
The Black Sabbath frontman was tested for the deadly virus during his heady heyday, and was left in shock when a blood test came back as HIV positive.
He tells Britain's Glamour magazine, "I went to the doctor and had an Aids test and he told me it was positive.
"That was one of the worst days of my life."
But after undergoing another blood test, the star was relieved to hear he had been misdiagnosed because of the impact his hedonistic lifestyle had taken on his immune system.
He adds, "When I used to f**king get loaded I would get myself into all kinds of situations.
"It turned out that because I was drinking and using drugs so much, my immune system had dropped so that it was a borderline result.
"When I went back to be tested again it was negative."