Tay has the biggest group of talented celeb BFFs ever! And the best thing about having talented friends is that she can surprise her fans with guest appearances on stage.

So for her show in Washington DC this week, she got Lorde to join her on stage! Lorde performed “Royals” as a duet with Tay – how awesome to see two pop queens working together!

Everyone in the audience got quite a shock, and Tay didn’t stop there. She also invited her friends from girl band HAIM and singer Jason Derulo to perform with her. It just goes to show how creating music with friends makes it even more fun!

Who would you want to see Taylor Swift do a duet with in the future TGs? Tell us in the comments below!