Britney Spears reportedly asked Kellan Lutz to play the part of her boyfriend in the video for her third single, "I Wanna Go", but the Twilight hottie has declined!

Spears and Lutz met for the first time at her Beverly Hills fundraiser for the St. Bernard Project earlier this month, and the actor didn't seem to have a problem with the pop princess then -- heck, he even told E! Online's Marc Malkin that "Oops!...I Did It Again" is his favorite Spears song!

Britney Spears Kellan Lutz

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The love interest is supposed to rescue Spears from the paparazzi and then make out with her in the backseat of a car.  No explanation was given as to why Lutz turned down the gig, and the part of Britney', but sources close to the pop princess deny the report that Matthew McConaughy was also approached for the gig.

Photos courtesy of Fame Pictures