The 23-year-old 'All About Tonight' hitmaker said her current relationship with model-boyfriend Oliver Cheshire is going well because she is not in touch with her exes, reported Contactmusic.
"It's really hard, I think. I had a few flings before Oliver and we haven't stayed friends, but I don't know whether it would be healthy to anyway," she said.
The blonde beauty said it is difficult to cut ties with old friends but it is in the process of growing up.
"If a friend turns out to be someone that you don't like or can't agree with, sometimes that's when you should start questioning things. I think it's part of growing up and it happens to a lot of people," she said.