Taylor Swift Bounces Out a New Tune 'Everything Has Changed' (listen) 1

Taylor Swift’s latest song, by design or accident, has appeared online. The tune, titled “Everything Has Changed,” features UK popster Ed Sheeran. It’s a bouncy tune… literally, from her new album Red.

The 22-year-old singer revealed that she wrote the song with Sheeran while they were playing around on her backyard trampoline.

“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?'” Swift recounted to MTV.

Of course, Ed did.

And so, he brought the guitar for some reason. We ended up writing an entire song out there,” she added. “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.”

Anticipation for Swift’s album has been building thanks in part to the release of four new songs from the set over the past month. She’s been teasing the songs on ABC’s “Good Morning America” before releasing them on iTunes.

Swift has also released breakup songs “We Are Never Ever Getting Back Together,” “Begin Again,” and “I Knew You Were Trouble” and “Red.” All are thought to have been inspired by her breakup with actor Jake Gyllenhaal.

She also released earlier this week “State of Grace,” a bass thumping country rock song about falling in love. The album will be released Oct. 22.

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