Christina Aguilera, "Dirrty"

Speaking of personal lubricant, Xtina really went for it in her “Dirrty” clip. Not trying to rock the societal boat too much here, but who decided that greasy people were sexy? The clean-up alone after a romp with Christina is going to put a dent in your wallet, for sure. And that’s not even figuring in the cost of your tetanus shot.