After the Pop star posted a picture of a close up of her lips on Instagram(Top right) and a fan commented about the scar on the corner of her mouth. Rihanna immediately attacked the fan with a series of abuses, calling her all sorts of names.
Although the fan shouldn't have asked the question in that manner, but the singer went a bit too far, i thinks it's about time all her fans/followers know she doesn't give a damn about them.