Cara Delevingne, Ellie Goulding, Lena Dunham and Selena Gomez were just some of the names appearing in Taylor Swift's Bad Blood video. And as for the 'unknown cameo' well she appears as the Headmistress at the 4:00 minute mark. We should've been more excited by the presence of Cindy Crawford, but for some reason we just feel a bit 'meh'... Now, if Taylor had gotten Madonna, or Grace Jones, that would've been something.
OK, so - technically - the 'unknown cameo' could've also been Kendrick Lamar, but we'll let you decide.
In case you're wondering what it's all about, we'll leave you in the capable hands of one YouTube commenter: "OH WAIT SO BASICALLY SELENA GOMEZ WAS POSING AS KATY PERRY RIGHT?"