Chris Brown isn't scared to throw shade at anyone on Twitter, even Rihanna. Just when we thought their latest split was amicable, Breezy seemingly aired out his ex over her alleged wandering eye. "She's not mine if she's everybody else's," he wrote this morning (without deleting it, per usual).

Brown didn't elaborate, but chances are the tweet was a response to Rih Rih's recent night out in New York City. The singer was spotted partying with New York Knicks baller J.R. Smith at Greenhouse nightclub, sparking rumors of a fling. A photo of the two doesn't show the beauty paying Smith much attention, however, even though they've been linked in the past. "She and J.R. are good friends," a source clarified for Hollywoodlife.com. "They always have been. She’s on good terms with all her ex’s but that doesn’t mean she’s dating them. They were both out chilling and celebrating last night – just having a good time."

As for ending things with Brown, the 25-year-old Bajan beauty confirmed the break up Tuesday (May 7), tweeting "Settling is not an option!" After the lone relationship statement, she went back to posting pics from the Big Apple, including a shot with her 15-year-old brother Rajad Fenty.

These two go around in circles so much that it's hard take this impending Twitter beef seriously, but hopefully they can keep the drama to a minimum.

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(Photo: Thomas Janssen, PacificCoastNews.com)