Pippa Middleton is one of those rare famous-by-association celebrities who attracts a minimum of ire from the general public. Maybe it’s because she doesn’t seem to be trying too hard to get our attention. Maybe it’s because she seems to agree that all the attention being paid to her (and her nice but relatively normal-looking backside) is a bit silly, but she will play along and smile for the camera nonetheless because it seems to make people happy. In any case, she’s turning 28 today, so I’ve assembled some nice photos of her (and her butt) wearing various outfits and having various types of fun. Happy birthday to you, and your little bum, too.