Rita Ora says mixing business with pleasure ruined her relationship with Calvin Harris

Rita Ora has opened up on her breakup with Calvin Harris..He broke up with her on twitter  and has since moved on to Taylor Swift..She tells the new issue of Marie Claire mixing business with pleasure ruined their relationship..

'It was more of a thing where I was in awe. I was at that point in my relationship where I felt he could do no wrong. I thought he had my back and that he'd never steer me wrong. 'But then I Will Never Let You Down(her NO 1track produced and written by him) came out, and everything started to go a bit weird. I don't know if it was because business was mixed with personal or what.'