Demi Lovato has been forced to defend herself over claims she ripped off both Katy Perry and Jessie J in her new summer hit.

The pop star’s track Cool For The Summer drew comparisons with hits from the other two stars as it includes lyrics about kissing a girl, like Katy’s 2008 song I Kissed A Girl, and some listeners claimed that the chorus was very similar to Jessie’s 2011 Domino.

But when Twitter went after Demi over what they said was a rip off, she stuck up for herself and hit back.

When Entertainment Tonight posted a story about the claims, she was quick to respond.

However, the controversy doesn’t seem to have done Cool For The Summer any harm as it managed to hit the number one spot on the iTunes chart.