Drake 'Gives Rihanna Ultimatum Over Chris Brown'.

Drake has banned Rihanna from speaking to her ex-boyfriend Chris Brown.The 'Hold On, We're Going Home' rapper has reportedly told his beau he'll only make their relationship official if she agrees to cut all ties with the 24-year-old singer.A source told the Daily Star newspaper: "Rihanna and Drake are just having fun at the moment....