Taylor Swift: 'I wrote Ed Sheeran duet on a trampoline'
The singer revealed that the pair wrote 'Everything Is Changed' while on a trampoline in her garden.
"I actually I wrote a song with Ed Sheeran on a trampoline in my backyard for the new album," Swift told MTV News. "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.
"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."
Swift also teased that the album features a collaboration with her "absolute favourite band", who she will reveal nearer the record's October 22 release.
She will perform at the 2012 MTV Video Music Awards tonight (September 6), in addition to the likes of One Direction, Pink and Rihanna.
Watch Taylor Swift in her video for 'We Are Never Ever Getting Back Together' below: