Did Keira Knightley Turn 30?
At the "Pride and Prejudice" premiere she actually looked kinda hot, so I am assuming she magically turned from boyish, plain-looking "Bend It Like Beckham" star and boyish, plain-looking "Pirates of the Carribean" star to sorta hottie because she hit that magical age.
Oops, my bad. No, it's because you can see her nipple.
Enjoy Her Nipple Here