Los Angeles - Rihanna thinks Rita Ora has a "lack of respect" for her.
The BBHMM singer is reportedly furious with the 24-year-old singer for recording a song with her ex-boyfriend Chris Brown and objects to the steamy video which is set to accompany the track Body On Me.
A source told The Sun newspaper: "There's no lost love between them, but this is another example of what Rihanna perceives to be a lack of respect by Rita.
"Chris and Rihanna have a long history and she hit the roof when she heard about 'Body On Me' - especially the video."
The 'Poison' singer has been trailing the clip - which is set to premiere on August 21 - since unveiling the song earlier this week, teasing it is her most "intimate" video yet.
She said: "The video has been shot, it comes out in a week and a half and I can't wait for you guys to see it. It's probably one of the most intimate videos I've ever done, but it's really exciting."
And the incident heightens the secret feud between the pair, three months after Rihanna allegedly banned Rita from entering her Met Gala afterparty in New York.
A source said at the time: "She has a real issue with Rita and this was her chance for revenge.
"She made it clear when organising her party that Rita was not to gatecrash under any circumstances."