Rihanna is under fire from parent groups for sending a vulgar tweet recently. The singer tweeted, "LMAO, Katt u lil cunt," after comedian Katt Williams made a joke about her on Twitter. Once the controversy was brought to Rihanna's attention, she then tweeted, "bite me".....In Rihanna's defense, "bite me" is a game she use to play with Chris Brown!
