If there's one thing you learn in fashion, it's don't mess with Anna Wintour. Throughout the years, a surprising number of celebrities were taught this the hard way. While the editrix is certainly not the type to cause a scene, it seems she makes her grudges known when it comes to sending out (or, in this case, withholding) those much-coveted invites to the annual Met Gala. Click through for the A-listers whose invites have been permanently lost in the mail.