Taylor Swift knows what she's doing. On Friday night as the Tommy Hilfiger show came to an end, the star shared a video of her dancing around to her ex Calvin Harris' hit song. The song, This Is What You Came For, was a bone of contention between the former couple this summer when it was revealed that the pair worked on the track together although Taylor used a pseudonym. But Taylor is clearly over it, as she danced in the front row with pal Martha Hunt as they supported model Gigi Hadid at the New York Fashion Week show.