Taylor Swift brought out Gracie Abrams for a mashup of her "1989" track "Out of the Woods" and Abrams' song "Us" from her "The Secret of Us" album.

Swift called 1989 a “bit of a rebirth” when she announced the set during a livestream event on Aug. 18, 2014. She said that she “woke up every single day that I was recording this record not wanting, but needing, to make a new style of music than I had ever made before.”