The model, 34, has confessed to hitting Danny Cipriani and Jason Statham during her apparently turbulent relationships with them.
Kelly makes the shocking claims in extracts from her new autobiography Close Up, printed in The Sun On Sunday (31 August).
While dating Hollywood action hero Jason Statham from 1998 to 2004, Kelly says she turned violent towards him when they attended Madonna's wedding to Guy Ritchie in December 2000.
Kelly says she saw red when Jason was talking to actress Gwyneth Paltrow.
She says: "Jason started to swing his hips from side to side and do a little jive with his arms, saying: 'Gywnnie, Gwynnie, Gwynnie. Sexy, sexy, sexy!' He turned round, only to be met with my fist in his face."
Kelly later admits she dealt rugby player Danny Cipriani a similar punishment when she believed he had given his phone number to a lap dancer in a Las Vegas club.
She says: "As I headed back to the table, I saw Danny walking towards me. I punched him straight in the face.
"At that point, four bouncers leaped on me. They picked me up like the crazy, drunk, betrayed woman I was."
Kelly is currently engaged to Celebrity Big Brother beefcake David McIntosh.
After David was the first to be voted out of the CBB house last week, he and Kelly were reunited and enjoyed a romantic dinner in London (28 August).
On his exit, Kelly tweeted: "Not gonna lie, I am so happy."
Seems like the Celebrity Juice star has finally found her happy ending.
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