Sources close to Brown's girlfriend, Karrueche Tran, said the two are living together, TMZ reported Saturday.
Tran was unfazed by Brown showing up at Rihanna's recent birthday party, the sources said, because he came home to her that night and took her to Miami the next day to celebrate Valentine's Day.
Brown performed Sunday at the 54th Grammy Awards in Los Angeles, his first time to attend the awards show since his 2009 arrest for assaulting then-girlfriend Rihanna, CBS said.
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