Rihanna and Chris Brown Unfollow Each Other on Twitter

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It seems Rihanna has finally had enough of Chris Brown ... the singer has "unfollowed" her ex-boyfriend on Twitter after he released a new diss track that appears to be aimed at her.
The song in question is a remix of Kanye's TheraFlu -- in which Brown freestyles the verse,

"Don't f*ck with my old bitches ... like a bad fur ... every industry n*gga done had her.

"Shook the tree like a pumpkin just to smash her

Bitch is breaking codes, but I'm the password."

Hours after Brown released the track last night, Rihanna stopped following Brown on Twitter
Soon after, Brown himself stopped following Rihanna, as well as tweeting out the following regarding the rumors: "Assumptions! I didn't say any names so if u took offense to it then it's something you feel guilty about."
All of this comes less than three months after the two joined forces on remixes of each other's songs