Some people, like Mr. Hollywood Tuna, don't find Keira Knightley attractive, or care about seeing her in various states of undress. Those people are free to express their opinions. However, their opinions are wrong. That being said, may I present to you, the ever-lovely, extremely attractive, Keira Knightley Nipple Slip pictures.
Update: Here is the Keira Knightley Nipple Slip from the Pride and Prejudice premiere.