Rihanna continues her love affair with exposing outfits with a black dress that showed off her boobs and nipples. Going braless in a thin, black dress while walking into the Eden night club in Hollywood, flashing cameras ended up giving the dress a sheer look. Once the dress became see-thru, cameras picked up Rihanna pierced nipple and thong underwear. She didn't seem to mind, though, and it's no wonder, since she regularly posts half-naked pictures of herself to Twitter and Instagram!