Mischa Barton “Fat” Says Nicky Hilton

Socialite and designer Nicky Hilton lashed out at actress Mischa Barton at a recent Hollywood party, calling The OC star a “fat cow.”

The 20-year-old younger sister of Paris Hilton was one of many stars at power manager Benny Medina’s 48th birthday celebration.

Slender Mischa, whose ex-boyfriend Brandon Davies has also dated Hilton’s sister Paris, shrugged off the insult by saying, “It probably says more about her than me.”

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