Taylor Swift says Britain's Prince William convinced her to join him and Jon Bon Jovi on stage for a performance.

The trio famously collaborated on the rock band's hit 'Livin' On A Prayer' - one of the Duke of Cambridge's favourite karaoke tracks - and she insisted he asked her to join him.

She explained: ''Jon Bon Jovi got up to perform and he called Prince William out because he'd heard he loves singing 'Livin' On A Prayer' on karaoke nights ... Prince William looked at me and said, 'I'll do it if you do it, too', and then he took my hand.

''I was surprised and flattered and it felt surreal and completely natural at the same time. We jumped on stage and started to sing and we were really yelling into the microphone and clapping hands. I still can't believe I've sung with Prince William.''

However while she doesn't want to offend him, she admitted both of them were ''more screaming than singing'', although she said he had a ''pretty good voice''.

She told the Mail on Sunday newspaper's Event magazine: ''Well, both of us were more screaming than signing.

''But even through all that I could hear his voice and it is pretty good. A nice tone. I'd definitely say he's got star quality, and if he ever wants me to sing with him again I'll be there.''