24 year old actress Mischa Barton was having difficulty with her dress all night while she was out having a good time on the town. As you would expect, the paparazzi followed her around due to her overwhelming celebrity status. It’s a good thing they did on this particular night, because as she exited the car one of her nipples slipped out. That’s right, a true Mischa Barton nipple slip ! I don’t think it gets much better than that, honestly. For more celebrity oops moments like Mischa Barton’s nip slip , visit Banned Celebs .