It's splitsville again for the hard-boozing Rihanna and Chris Brown—at least on Twitter. The pair have been exchanging flirty tweets, fueling reports that they were quietly back together. But that's all over now—and it's all because of a remix. Brown tweeted a line from Kanye West's "Way too Cold" about "my old bitch," and how "everybody don had her/shook the tree like a pumpkin just to smash her." Rihanna apparently believed Brown was referring to her, and tweeted: "Aw, poor dat #neaux1currrrr," and promptly unfollowed her old beau. He did the same after tweeting: “Assumptions! I didn't say any names so if u took offense to it then it’s something you feel guilty about."