Let go of the hatred...
As some (honest) people have already said, this is nothing more than a no brainer beat-em-all with a pretty face. There was nothing more involved than the repeted pressing of one button. Even kicking the baby south park style was uninteresting. It could just as well have been a flash movie, and it would have probably been better so.
Anyway I don't know, or rather I didn't, who the fu*k is Kevin Federline, and I don't care. People such as him, Britney or whatever are best treated with contempt.
If you are so adamant on being part of his downfall, why don't you pray God, Yahve, Bouddha, Allah, Satan, Cthulhu or any other mesopotamian, egyptian, scandinavian, greek, roman or pagan god you would be more comfortable praying to (no offense intended to any religion here, heh), and hope they assist these nobodies in choking on their own mediocrity and vulgarity.
Anyway I don't find this game funny or entertaining in any way, and obviously not worth the huge success it got. Some of your games are just so so much better (dad and me comes to mind...), it's kinda sad this game is so well rated.