Jonas Brothers star Joe Jonas has denied cheating on ex-girlfriend Taylor Swift - putting the break-up down to "a change of heart".

Jonas came under fire recently after Swift revealed he had ended their relationship in a 27-second phone call and accused him of dumping her for 10,000 Bc actress Camille Belle.

But the teen heart-throb has now hit back - and is adamant he was never unfaithful to the country singer.

He writes on the band's official blog, "I never cheated on a girlfriend. It might make someone feel better to assume or imply I have been unfaithful but it is simply not true. Maybe there were reasons for a breakup. Maybe the heart moved on. Perhaps feelings changed."

And Jonas insists that the reason their break-up conversation took place in less than 30 seconds is because Swift slammed the phone down on him.

He adds: " I called to discuss feelings with the other person. Those feelings were obviously not well received. I did not end the conversation. Someone else did. Phone calls can only last as long as the person on the other end of the line is willing to talk. A phone call can be pretty short when someone else ends the call. There were later attempts at communication that had no response.