She’s a ridiculous talent. She’s a savant, I think, it goes beyond talented. She’s a savant. She sent me a voice memo, we did two songs, Welcome To New York, which is track one, and we did, [I know places], which is track 10. Anyway, she sent me voice memos, like, in the morning ‘here’s me on a piano, here’s how I’m hearing this,’ and literally I’d walk in and have it mocked up kind of, and we’d just bang it out. I’d help with the melodies, kind of, but with Taylor, you function more as an editor. She has a million ideas and you’re more like ‘this one, not that one,’ because she’s just so good, kind of almost doesn’t need you in the room, but for production, I think, is when she really relies on you. So for Taylor, you’re really producing more than just writing stuff. She can write everything by herself.
Ryan Tedder to Access Hollywood on working with Taylor Swift