Hear What Ed Sheeran-Written Song He Wishes He Had Kept for Himself

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Ed Sheeran performs during Rock in Rio at the MGM Resorts Festival Grounds on May 15, 2015 in Las Vegas.

Ed Sheeran has proven to be a hit-making songwriter for himself as well as other artists like Justin Bieber and One Direction. But once when he was in the middle of writing a song for someone else, he realized he should've been selfish and kept it for his own collection.

So which song does he wish he would've recorded himself?

"The one on Tori Kelly's album, 'I Was Made For Loving You,'" Sheeran revealed to Karen and Jeffrey of Fresh 102.7 NY Thursday morning (Jan. 12). "I remember writing that with Tori and saying before, 'Whatever we write, definitely for your album, don't worry about it,' and remember halfway through being like 'Aghhh, God I wish I was keeping this.' It is a really beautiful song and it's turned out so, so well. But that's one song that I wish I'd kept."

Despite feeling a slight sense of regret, Sheeran still got to sing on the Unbreakable Smile track, as Kelly featured him as her duet partner on the song. The 25-year-old singer also made the point that he still has a long career ahead of him. "Hopefully I'm going to write another song like that," he added.

Sheeran also had a hand in writing two of Bieber's biggest hits of 2016, the Billboard Hot 100-topping "Love Yourself" and his Major Lazer/MØ collaboration "Cold Water." He revealed to Carson Daly that "Love Yourself" was originally written for his upcoming album, Divide -- which he announced will be dropping March 3 -- and he didn't even realize he'd played a part with "Cold Water" until he heard what Diplo and Bieber had turned his original composition into.

We may just be hearing more Sheeran-penned hits soon, as he seems to have an entire catalog of unused tracks.

"Songs often end up in a place called 'song jail,' where they just never get released," he said. "So anytime anyone wants to do anything with them -- I know what songs are gonna go on my album, and if they're not going to go on my album, then they're free for anyone else."

Listen to "I Was Made For Loving You" below.