Taylor Swift’s musical tribute to her ex Harry Styles will make you cry

Taylor Swift's relationship with Harry Styles might have been short-lived, but it's certainly lived on through her music.

Just days after One Direction dropped their new single Perfect – believed by many to be a direct dig at Taylor – the singer herself has revealed how deeply the three-month romance affected her.

The revelations comes in a new clip, recorded at the Grammy Museum a few weeks back and posted to YouTube yesterday.

Before kicking off an acoustic – and highly emotional – performance of Out Of The Woods, Taylor tells the audience about the "fragile" relationship that inspired the song.

"The number one feeling I felt in the whole relationship was anxiety," she says.

"Because it felt very fragile. It felt very…tentative… How long do we have before this turns into an awful mess and we break up? Is it a month? Is it three days?"

Taylor, who has been dating Scottish DJ Calvin Harris since March of this year, seems to have matured in her approach to relationships since things ended with Harry.

"I think a lot of relationships can be very solid, and that's what you hope for, solid and healthy, but that's not always what you get," she continues.

Despite its messy end, Taylor admits she still looks back on her romance with Harry as a "special" time.

"It doesn't mean that it's not special and extraordinary just to have a relationship that's fragile and somehow meaningful in that fragility," she explains.

If those lines haven't made you well up already, the performance itself certainly will – check it out below.