On Saturday night in London, Tay made every Swiftie's life when she invited six famous friends to join her on the stage. In video captured inside London's Hyde Park, Tay began singing along to her smash-hit single "Style." One by one, a few famous faces began strutting their stuff in front of a sold-out crowd. Is that you we see, Kendall Jenner? Oh heyy, Cara Delevingne.
The list goes on, too, folks. Gigi Hadid, Martha Hunt and Karlie Kloss walked on stage with a singing Taylor, too. The best and most random guest had to be tennis champ Serena Williams, though.
"Cool down after the @TaylorSwift concert with my BFF @Carowozniacki," Serena wrote on Instagram after the unique experience. Lance Bass and opener Ellie Goulding were also in attendance for T-Swift's Saturday show.
Watch Taylor flaunt her lovely lady friends, below. Who runs the world?!