Taylor Swift, Ed Sheeran Perform With Cara Delevingne! 

Taylor Swift and pal Ed Sheeran have teamed up with an unlikely duet partner for their latest song together.

T-Swizzle took to Instagram last night (February 6) to share a video of herself, Ed and model of the moment Cara Delevingne performing a version of The Knife's Heartbeats.

She accompanied the clip with the comment: "Me, Ed, Cara. Singing songs in the US ambassador's house. What is life."

The footage shows the trio standing at the bottom of a staircase in the house, with Ed also playing the guitar as Cara joins Taylor on vocals.

Swift - who played her final night at London's O2 Arena as part of her Red world tour last night - also uploaded a pic of herself and Delevingne standing alongside each other, doing their best impression of the first president of the United States, George Washington.

The 23-year old singer wrote alongside the image: "Just trying to be like George Washington. @caradelevingne."

As well as their impromptu performance, Taylor and Cara also have another thing in common having both been linked to One Direction heartthrob, Harry Styles in the past.

Taylor Swift - Everything Has Changed (Ft. Ed Sheeran)