Showbiz
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Brandon Davis made the comments on his Twitter page after spotting Barton at a Nylon magazine party, the New York Daily News reports.
"Omg," he wrote. "Just realised my ex turned in to 1 of the fattest people in the planet. I'm gonna start dating plus sized models. Not! Mischa the Hefer."
A source claimed that Barton was visibly upset by the remarks and added: "She was chain-smoking the entire night. Mischa was never without a cigarette in her hand - and a puss on her face."
Earlier this week, Barton laughed off criticism of the outfit she wore over Easter.
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