Celebrities flashing their nipples or wearing totally see-through tops is no new thing, but it's not very often that there's a piercing involved as well. We can only assume that Rihanna's very proud of her nipple accessory – and her boobs for that matter – as she's certainly not shy about giving us all a good look. Rihanna, we love you, but please put the nips away now.
Who's flashing some nip?