Ozzy Osbourne was once diagnosed as HIV positive - but later told the test results were wrong.

The Black Sabbath rocker was devastated to be told he had contracted the deadly virus, before further medical investigations revealed the results were due to the damage years of drug and alcohol abuse had caused to his immune system.

“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,” Ozzy explained in an interview with Glamour magazine. “When I used to get f***ing loaded I would get myself into all kinds of situations. It turns 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.”

Meanwhile, Ozzy, 60, is delighted to have finally passed his driving test at the 19th time. The musician blamed his heavy drinking for decades of failing his road examination and says he was only properly ready to get his license last year.

“For the first time in my life I’m legal to drive - so watch out,” he said. “I would go for my test and they would see me and go, ‘No Mr. Osbourne. Come back another day - I’m not even getting in the car with you.’ I’d be walking round the test center with a bottle of vodka In my pocket.”