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Rihanna, Chris Brown, Karrueche Tran

Mazur/WireImage.com; JosiahW/TK/Splash News

Peace out, Breezy.

Rihanna and Chris Brown's relationship has always been tumultuous or worse, but the Barbadian beauty's tweets Tuesday night seemed to imply things might be over...or just the latest wrinkle.

Chris's ex-girlfriend Karrueche Tran reportedly joined the R&B singer on tour in Paris earlier this week. (Chris was even spotted wearing a hat that appeared to be from Karrueche's clothing line, the Kill.) Rihanna, apparently not amused, tweeted (then deleted) Tuesday, "Goodbye muthaf--ker."

"You give, you get, then you give it the f--k back," she added, then took down. "Examine what you tolerate." (Although the timing could be purely coincidental, it seems unlikely. You be the judge of that, though.)

Somehow we expect to see a bunch of super sexy, make-Chris-jealous Instagram shots in the coming days.

—Additional reporting by Melanie Bromley