Nintendo have cornered the market in cheesy celeb endorsements for their products and Cruz's latest star turns is one of our favourites. In the commercial, Cruz and her sister giggle their way through various stages of New Super Mario Bros. 2 on their 3DS XL's. The sisters cook up a forfeit for the loser which we won't spoil, check out the video to see Penélope Cruz as you've never pictured her…