Watch Taylor Swift's New Music Video For "Bad Blood" And Be Prepared To Watch It Again

Selena Gomez makes the first appearance…because they're besties of course.

Quickly followed by Lena Dunham, Ellie Goulding, Zandaya, Karlie Kloss, Gigi Hadid, Cara Delevingne, Jessica Alba, Cindy Crawford and others…basically a sh*t ton of amazing female celebrities.