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Rihanna is upset over Rita Ora's new music video with Chris Brown which is highly sexual. (Getty)

Barbadian singer/actress Rihanna is reportedly upset with Rita Ora over former boyfriend Chris Brown.

According to The Sun, the 27-year-old FourFiveSeconds hitmaker is unhappy because Calvin Harris' former girlfriendfilmed a new track, Body On Me.

"There's no lost love between them, but this is another example of what Rihanna perceives to be a lack of respect by Rita," a source said. "Chris and Rihanna have a long history and she hit the roof when she heard about Body On Me – especially the video."

Brown had infamously assaulted the Grammy award winning singer in 2009, by hitting her so forcefully that she had major bruises on her face, a split lip, and a bloody nose.

However, the two of them still have a strong and complicated bond, despite their public breakup. And Brown recently admitted that he is still in love with Rihanna.

During a concert, the 26-year-old R&B singer performed his rendition of Rihanna's latest hit B***h Better Have My Money.

In the short video posted online, the Loyal hitmaker can be seen telling fans that the Diamonds is "my b***h for life".

During an interview with Tim Westwood, Brown was asked why he chose the song, to which he replied: "She's my homie though. We knew each other since we were 14, 15 so with that kind of history, we are always going to be cool. I don't get jealous. I don't get mad. I got nothing but love and respect for her."

"I respect her as an artist," Brown continued. "Obviously people are going to make a spectacle, like 'Oh, he's playing her music!' But who doesn't? I'm pretty sure she plays my music."