Her new track, The Story of Us, is about one of her former boyfriends and Swift admits their chance meeting at a glitzy showbiz ceremony was so emotional, she had to put her pain down in words.
Swift, who refuses to reveal the ex's identity, tells New York Magazine, "It was at an awards show and there had been this falling-out between me and this guy. I think both of us had so much that we wanted to say, but we're sitting six seats away from each other, just fighting this silent war of 'I don't care that you're here.'
"I remember getting home and sitting at the kitchen table and saying to my mum, 'It was like I was standing alone in a crowded room.' That's when my eyes glazed over and I got distracted and walked away to write. My mum is used to me doing that."