inputs: hypothesis: Rihanna's boyfriend won a Grammy Award. premise: Rihanna's hell ride through Hollywood began when she intercepted a booty call to her boyfriend from a rival. "A three page text message" from a woman Chris Brown had "a previous sexual relationship with" popped up on his cell phone as the singer drove home with Rihanna by his side from a pre-Grammy Awards party. "A verbal argument ensued" that quickly escalated out of control, with Brown delivering a brutal and bloody beatdown of Rihanna as they hurtled through L.A. in a silver Lamborghini, according to a shocking affidavit.