They just collaborated for two songs and were rumored to be igniting back their flame. But it seems like the two can never be on the same both again as Brown apparently dissed the Barbadian singer on a remixed track.

Ex lovers Chris Brown and Rihanna has collaborated with each other for two songs. Adding up to that, Chris Brown was present at Rihanna's birthday celebration this year. Signs of reconciliation between the two seem positive as they sometimes exchanged tweets to greet each other or to promote their singles.

However, the two have stumbled back into being each other's foe and their Twitter accounts can prove it. Rihanna recently "unfollowed" Chris Brown on her Twitter account after he posted a remixed track that was assumed to be about his ex girlfriend.

"Don't f*** with my old b*****s ... like a bad fur ... every industry n***** done had her,' continuing: 'Trick or treat like a pumpkin ... just to smash her," Brown did his version of Kanye's TheraFlu.

After the track created speculations that it might be for the Barbadian singer, Brown reacted by posting another tweet saying he didn't mention any name. He added that if someone took it as an offense then the person might be guilty.

"Assumptions! I didn't say any names so if u took offense to it then its something you feel guilty about," Brown tweeted.

Meanwhile, Rihanna who has always been active on Twitter didn't have any posts or reaction about the issue. Over the past hours, the singer has been tweeting pictures of her and her brother.

Back in March, Rihanna talked about Chris Brown during her interview with Ryan Seacrest on the KIIS FM radio show.

"I reached out to him about doing Birthday Cake because that's the only person that really, it made sense to do the record," Rihanna said. "I thought about rappers, and I've done that so many times, and the hottest R&B artist out right now is Chris Brown. So I wanted him on the track."

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