Taylor Swift has been joined by a host of famous friends throughout her current world tour, but last night's show in London's Hyde Park must have been her most star-studded yet.

She's made a tradition on the 1989 tour of getting her model mates up on stage during her song Style - and yesterday she had a roster that would make Donnatella Versace turn green with envy.

T-Swizzle was joined by Kendall Jenner, Gigi Hadid, Karlie Kloss, Martha Hunt and tennis champ Serena Williams. Oh, and Cara Delevingne was there too, waving a union flag around.

And things got even more glittery backstage, where a snap tweeted by support act Lauren Aquilina revealed that they'd also been joined by Emma Watson backstage.

Who needs Glastonbury anyway, eh?

spent tonight surrounded by badass girls and couldn't be happier about it pic.twitter.com/R5pM0MHZia

— Lauren Aquilina (@laurenaquilina) June 28, 2015