Taylor Swift has revealed that her forthcoming duet with Ed Sheeran was coined when the pair were messing about on a trampoline.

The country pop singer is releasing her latest album 'Red' on October 22 and she previously confirmed that a highly anticipated duet with British singer-songwriter Ed Sheeran is to feature on it.

She has now revealed that the track is called 'Everything Is Changed' - and the US singer said that it was written in a rather unusual location.

Swift admitted that the song was penned whilst the duo were sitting, and occasionally bouncing, on a new trampoline. The 'Love Story' singer said:

"I actually I wrote a song with Ed Sheeran on a trampoline in my backyard for the new album. So I can't wait for you guys to hear that. That's a song called 'Everything Is Changed'. We, for real, [were] sitting on my trampoline in my backyard cause we had been writing a song and I was like, 'Hey, I just got a trampoline. You want to see it?' And so, he brought the guitar for some reason."

Swift added: "We ended up writing an entire song out there. For portions of the song, [we were bouncing around] 'cause it's a trampoline and it's fun, and the combined maturity level of both of us is 8 years old." Watch the video for Taylor Swift's latest single 'We Are Never Ever Getting Back Together' below: