While on tour abroad, Taylor Swift threw an impromptu jam session with Ed Sheeran and model/actress Cara Delevingne at the London home of U.S. ambassador Matthew Barzun over the weekend.

During their visit, the three sang songs and posed for photos in front of an over-sized portrait of George Washington. Taylor tweeted, “Me, Ed, Cara. Singing songs in the U.S. ambassador’s house. What is life.”

Ed was Taylor’s surprise guest at her concert in Berlin on Friday. Her final performance at London’s O2 Arena is Monday.