Talk about a bold move, Kelly Osbourne!

The outspoken personality has taken to Twitter to call out her father's rumored mistress on Twitter. The former Dancing with the Stars diva went so far as to post the phone number of the woman in question, hairstylist Michelle Pugh, to social media.

Never underestimated a daughter scorned!

On Monday night, Kelly O wrote, "Anyone looking for cheap chunky LOW-lights a blow out and a b--wjob call …" and then included the woman's phone number. Ouch! (And btw: we totally called it, it rang -- the number is real!)

Earlier this month, Ozzy and his wife, Sharon, 63, split earlier this month after The Talk co-host allegedly discovered that her husband of almost 34 years had been having a secret affair with the L.A. hair stylist, who reportedly cut both Kelly and Sharon's hair. Wow!

Apparently the silver-tongued Brit found out about Ozzy's cheating ways when she searched his email. A source told Us Weekly that the mother and daughter duo were very upset at finding out the news. The outlet claims that Sharon, "was upset that he was supporting this woman! She and Kelly both called the salon [where Pugh worked] repeatedly for about two weeks before the news broke, trying to get in touch with Michelle. They were really angry."

On May 10, Sharon confirmed her split to the Black Sabbath singer while on The Talk. She addressed the audience, "I've been avoiding looking at any pictures or reading anything. I know what's going on," Sharon said. "I don't need to read about it and see about it because it's like putting salt in a wound. So I don't need to."

This isn't the first cheating scandal the couple have been caught up in. Sharon admitted back in March that she once found her husband in bed with two nannies. Wow!