Singer Rihanna and estranged boyfriend Chris Brown are back together and vacationing at Sean Combs's mansion in Miami Beach, Fla. According to a report on People.com, Brown, who allegedly battered Rihanna on the night before the Grammys, called his ex on her 21st birthday and the two began to reconcile. Brown was booked by police on Feb. 8 for making criminal threats but no charges have been filed. (Photo: WENN)