Taylor Swift has said that she found singing "Livin' On A Prayer" with Prince William and Bon Jovi 'surreal' but said she would take to the stage with the young royal again in a flash.Taylor told the Mail on Sunday's Event magazine that it was Prince William's idea.Swift explained, "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 natural at the same time."We jumped on the stage and started to sing and then we were really yelling into the microphone and clapping hands. I still can't believe I've sung with Prince William. Even through all that I could hear his voice and it's pretty good. A nice tone. I'd definitely say he has got star quality. If he ever wants me to sing with him again I'll be there. It was a night I will remember until I'm very, very old. The whole evening was completely wondrous."