Paris Hilton was the first choice for MTV's 'Bruno' prank

At Sunday's MTV Movie Awards in LA, viewers were shocked when Sacha Baron Cohen landed nearly butt-naked on rapper Eminem's face. A shocked Eminem then cursed and stormed out of the theater.

But an MTV insider has told Life & Style that producer Mark Burnett cleared the prank with the rapper beforehand. However, Eminem wasn't aware of exactly how naked Sacha would be when he agreed to do it!

A second insider also confirms that Eminem was actually Burnett's second choice. The first? Heiress Paris Hilton, who, luckily for her, declined to participate (probably because she was on a date with boyfriend Doug Reinhardt!). "Paris is quite happy she turned down the offer," the insider tells Life & Style.