Taylor Swift always puts her "heart and soul" into her music.

Taylor Swift

Taylor Swift

The 'Look What You Made Me Do' hitmaker knows how important it is to bare all when writing new music, according to Jack Antonoff, who co-wrote six songs on her latest album 'reputation' including the lead single.

He said: "The sessions were just her and I. She would come over to my apartment, and we would talk and eat and talk more, and the things we talked about turned into songs. She is great at remembering the heart and soul of the process ... But she's really great at knowing what it's about: talking about what the hell is going on in your life and somehow finding a way to take that exact emotion and make a song out of it. That was the theme of those sessions, 'Let's just tell this story, whatever that story is, because that's the whole point.'"

And Jack loves how Taylor's album is so "intense" and says it really gives the "whole gamut of what it actually is like for the artist to be alive at that moment".

He added to Entertainment Weekly magazine: "It's an intense album, and that's what I care about. In the course of a day - in the course of two minutes - you can feel like you can conquer the world, or you can feel like the biggest piece of garbage that ever existed. An album or song should feel that way too. It should have the whole gamut of what it actually is like for the artist to be alive at that moment."