VIDEO : Taylor Swift Talks Harry Styles, Turns 'Out of the Woods' Into Piano Ballad

To celebrate the first anniversary of 1989, Taylor Swift gave her fans a birthday present ? since albums can't appreciate gifts. And if that's not enough to make you feel things, she introduced the song by describing its inspiration: her ill-fated relationship with One Direction's Harry Styles. "The number one feeling I felt in the relationship was anxiety, because it felt very fragile. It felt very tentative," said Swift. "It always felt like, okay, what's the next road block?