The socialite couldn't quite see who Sacha Baron Cohen's semi-naked Bruno character had landed on on his way to the stage until Eminem got up and walked out of the Universal Amphitheater -- but she's convinced the prank was more than just a publicity stunt.
Although Eminem appeared to be speaking into a microphone when he yelled, "Are you f**kin' serious?" as he looked into cameras over a suspended Cohen's bare backside, the rapper's entourage manhandled the funnyman in such a way that it looked as if they weren't prepared for the Brit's outrageous entrance -- and Hilton feels sure it was all a big surprise.
She says, "I don't think he (Eminem) knew because I talked to someone who was running the show before and he said a big surprise was gonna happen and the person didn't know it was gonna happen."
And Hilton isn't surprised Eminem stormed out after the unfortunate incident: "I think anyone would be mad if something was, like, in your face like that... It was very odd."
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