After rumors exploded that Audrina Patridge’s man had hooked up with her friend Lauren Conrad, both women spoke out, sparking a public feud.

But the person at the center of the controversy, Justin “Bobby” Brescia, stayed silent — until now. “I never hooked up with her,” Justin, 25, was overheard telling a pal at West Hollywood hotspot One Sunset on October 10. “It’s all for the show.”

But the Hills star wasn’t in the mood to talk about it for long. When fellow partiers attempted to talk to him about the rumored fling, “he seemed annoyed that the topic came up,” says one onlooker. “And when a group of blondes tried to ask him about it, he threatened to punch them!”

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