Pop star Taylor Swift teamed up with singer Ed Sheeran and model Cara Delevingne for an impromptu performance at the home of a U.S. diplomat in London on Thursday (06Feb14).

The Love Story hitmaker is currently in the U.K. for her five-night-residency at the British capital's O2 arena, and she moved her show to a smaller venue by performing in the foyer of the American ambassador's house.

Swift posted a short video of the trio's performance on Instagram.com, and wrote, "Me, Ed, Cara. Singing songs in the Us ambassador's house. What is life."

Sheeran, who has been touring with the singer, strummed on his guitar and sang lead vocals on Heartbeats by The Knife, while Swift and Delevingne joined in with harmonies.

Swift will end her world tour in London on 11 February (14).