Sharon Osbourne laughed at Kelly's mistress tweet

Sharon Osbourne thought it was "funny" when her daughter Kelly tweeted the phone number of Ozzy Osbourne's alleged mistress.

The former 'Fashion Police' star tweeted the details of Michelle Pugh, who she believes was sleeping with her father behind her mother's back and the 'Talk' host insists she wasn't angry with her and always feels "proud" of her outspoken offspring.

Speaking on 'The Talk', she said: "Oh, Kelly has the best sense of humour ever.

"And you know what? In cases like this, what can you do but laugh? What are you gonna do -- be angry with her because she loves her mom and dad and she wants us to be together? She loves us. She can do what she wants, because she's an adult. You have to laugh. She is just so funny.

"I'm always proud of my girl."

Her co-host Sara Gilbert also defended Kelly.

She said: "She's got your back."

Meanwhile, it has been claimed Michelle was more interested in Sharon than the 67-year-old rocker.

A source told the New York Post newspaper's Page Six column: "She wants to be Sharon. That's why she wanted Ozzy. She didn't really care about him. She wanted everyone to know that she and Ozzy were together. Ozzy will never talk to that woman again."

It was previously claimed Ozzy had allegedly been sleeping with his hairdresser for some time and Sharon even discovered he had been "supporting" the woman.

A source revealed: "Sharon found out about the affair by searching through Ozzy's emails. She was upset that he was supporting this woman!"

After she found out about her spouse's alleged infidelity, Kelly and Sharon bombarded Michelle's place of work, believed to be the upmarket Mêche Salon in Beverly Hills, with phone calls and subsequently had her fired.

The insider explained: "She and Kelly both called the salon repeatedly for about two weeks before the news broke, trying to get in touch with Michelle. They were really angry. Sharon is the reason Michelle was let go."

Sharon confirmed she'd split from the 'Paranoid' hitmaker, whom she married in 1982, on 'The Talk' earlier this month as she thanked fans for their support.