According to a source close to the couple, they have been "taking a break."
The source tells E! News that the pair are not calling it a formal breakup, but have decided to put some distance between them. We are told they plan to see each other soon.
Reps for both singers have not returned calls seeking comment on the break.
Last Thursday, Rihanna flew to New York City, where she, Brandy, Beyoncé and Jay-Z reportedly enjoyed a quiet dinner together at the Spotted Pig Friday night. Then on Saturday night, she dined with friends at Da Silvano.
Meanwhile, Brown has remained in Los Angeles. Sources tell E! News that the "Kiss Kiss" singer has spent the entire time working on his album, most recently at the Record Plant in Hollywood.
"He's just putting ideas down for some songs he wrote," says a Brown source. "He needs to feel like he's moving forward."