During an interview with MTV News, Swift claimed that she wrote the track – entitled Everything Is Changed – on a trampoline in her garden.
Speaking of her collaboration with Ed, the 22-year old explained: “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.”
She 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.”