And look who came to support — a certain BFF named Taylor Swift.
Tay looked v v proud next to fellow bestie Martha Hunt, and Gigi's brother and mother, Anwar and Yolanda.
But wait. What's happening in this video that Taylor posted?
Yes, that is freakin' "This Is What You Came For" playing. A song by her ex, Calvin Harris. A SONG THAT TAYLOR SWIFT WROTE UNDER A PSEUDONYM AND WHOSE FALLOUT CAUSED SOME DRAMZ.