Britney Spears: I Need A Nerd With A Giant Penis?

Britney Spears' ideal guy is a mix between Bill Gates and rapper The Game.

Spears was performing at her Vegas residency Sunday night, but went a little off script when it came time to pick out a random guy from the crowd.

Brit got real specific, saying she needs a "hot nerd" -- innocent enough -- but it sounds a lot like she wants one who's packing in the right places.