Is Rihanna to blame for Rita Ora's label lawsuit - to ensure her rival's career wasn't treated as a priority?

She is one of the most successful pop superstars in the world. But Rihanna is said to have used her power in the industry to halt the career of her fellow labelmate Rita Ora. The Sun is reporting that Rihanna's dominance within Jay Z's Roc Nation record company is one of the major factors for the X Factor judge filing suit to end her contract with the label. It has been alleged that Rihanna gets first choice when it comes to new songs, despite Rita still not having released a follow-up album since her 2012 debut. A source tells the newspaper: 'Rihanna has never liked Rita and has been using her power at Roc Nation accordingly.

Songs that might be submitted to her are automatically given to Rihanna, who may then hold them for months before deciding she doesn’t want them.

'Rita's ex-boyfriend Calvin Harris is also a power player at Roc Nation, famously banning the star from performing I Will Never Let You Down, a track he produced for her during their relationship.

 Rita launched legal action to end her relationship with Roc Nation earlier this month, claiming the agreement is in violation of California's 'seven-year rule' and that she has been forgotten about as executives take the business in a new direction.