Rihanna Tweets death threats to Chris Brown's girlfriend

Rihanna‘s Twitter feud with Chris Brown‘s girlfriend Karrueche Tran has gone to absurd levels, with fans now sending death threats to Tran on the social-networking website. According to TMZ, some of the violent tweets read, “I hope Rihanna beat the dog s— outa yo a–,” “Watch yo back” and “I will kill you.”