Ozzy Osbourne has reportedly been cheating on his wife Sharon with multiple women.

A source told the publication: "This was the last straw for Sharon. She's looking the best she's ever looked and she's ruling the world right now -- she doesn't need this. She's devoted her whole life to this guy."

Sharon confirmed her split from the Black Sabbath rocker, whom she married in 1982, on her chat show 'The Talk' this week as she thanked fans for their support.

She said: "I'm 63 years of age, and I can't keep living like this ... I've been avoiding looking at any pictures or reading anything. I know what's going on. I don't need to read about or see about it. It's like putting salt in a wound. I don't need to ... He's back, and now I'm out of the house."

Sharon is said to have gone "ballistic" when she found "proof" he had an affair.

A source said: "Sharon went ballistic with Ozzy and accused him of having the affair. She said she had suspected something had been going on for some time and now had proof.

"People are wondering whether Sharon went through Ozzy's phone before accusing him. She has done that before but in the past she was checking if he'd been using drugs. Ozzy was extremely sheepish and admitted being close to Michelle. It is likely Sharon has discovered calls and possibly meetings."

Meanwhile, the infidelity claims sparked rumours the 67-year-old rocker, who has battled with drugs and alcohol addictions in the past, had fallen off the wagon again.

However, although he refused to deny reports he'd cheated on his wife, the mother of his children Kelly, 31, Aimee, 32 and Jack, 30, he quickly poured cold water on relapse reports.

He said: "I have been sober for three and a quarter years. I have not touched drugs or alcohol in that time. Any reports that I am not sober are completely inaccurate."