12/28/2010 11:34 am ET Updated May 25, 2011

Kelly Osbourne LASHES OUT At Alleged Cheating Ex, Quits Twitter

Kelly Osbourne still isn't over her ex-boyfriend's philandering ways. The 26-year-old star slammed ex-fiance Luke Worrall in an expletive-loaded Twitter rant.

"Luke Worrall is the biggest piece of s***. He has been trying to get back with me. I only came home for Christmas to see him, meanwhile he has been f***ing hundreds of girls, as well as men, behind my back," she wrote.

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