'I Knew You Were Trouble' songstress Taylor Swift has opened up about singing with Prince William back in 2013 and confessed that it was a "surreal" thing to do. 

Speaking about performing with the Prince at a Kensington Palace charity event last year, which saw them singing a rendition of 'Livin' On A Prayer' alongside Bon Jovi, she explained that it was an unforgettable experience:

"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."

Swift is currently performing a series of live dates at London's O2 Arena and her next shows will take place on Monday, February 10 and Tuesday, February 11. The Vamps will support both dates. 

Watch her perform with Bon Jovi and Prince William here: