Rita was on the red carpet in New York for the launch of the scent, which she is the face of, but wasn't in the mood for answering questions about her ex.
After chatting about the perfume and her forthcoming album, one plucky interviewer tried his luck by slipping in a cheeky question about Calvin.
But the 23-year-old singer saw red and cut the interview short when she walked off in a bit of a huff.
Rita wasn't quite so tight-lipped about Calvin earlier this month when she claimed he'd refused to give her permission to perform their track 'I Will Never Let You Down' at the Teen Choice Awards.
In a new interview on Ryan Seacrest’s radio show, she said: “He has to approve anything TV-wise… and obviously he owns the rights to it, and he didn’t approve the Teen Choice Awards.
“I was scheduled to perform. We put a lot of work and effort into the show, and every time I do a show I rehearse about a month in advance. You know, I could have got told a few weeks earlier. That would have been nice.”
But Calvin fired back a response on Twitter, writing: "You'll only know 1 side of the story RE Teen choice awards because I choose not to talk to the papers about every aspect of my personal life… But just know I had a damn good reason."