Dave Grohl's ex, Kari Wuhrer, has claimed he is a "scumbag" who regularly cheats.

Kari, 57, who dated the Foo Fighters singer in the 90s, wasn't surprised to hear that Dave had been unfaithful to his wife of 21 years, Jordyn Blum.

She told TMZ that Dave, now 55, was seeing her while he was also dating his ex-girlfriend Tina Basich.

Kari didn't know about Tina and spoke about their relationship on the Howard Stern Show. Tina heard about the interview and consequently split up with the singer.

"I was letting the cat out of the bag ... I never heard about her. He never spoke of it," she told TMZ.

After the interview, Kari said she never heard from Dave again. They bumped into each other occasionally, but she claims, "he would just look at me like I didn't exist."

She added, "I just felt like I knew he was a scumbag after that."

The singer confessed his infidelity to his wife on Instagram last week, also admitting that he had fathered a daughter outside of his marriage.

"I've recently become the father of a new baby daughter, born outside of my marriage," he wrote. "I plan to be a loving and supportive parent to her. I love my wife and my children, and I am doing everything I can to regain their trust and earn their forgiveness."

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