Singer Sam Smith has revealed that performing with Taylor Swift was an incredible yet daunting experience.

Back in February, Smith took the stage at London's O2 Arena to perform a rendition of his hit single 'Money On My Mind' with the country-pop beauty and he has now revealed how that live collaboration came about:

"She's amazing. Her team called me about three weeks previous to the show and said that she really liked the song. I thought it was the whole team's plan, but when I turned up she genuinely loved the song and we rehearsed together, and she was amazing."

When asked if the 'I Knew You Were Trouble' star was able to learn the song quickly, Smith added: "Yeah, she'd learned it; her whole band and her had learned it. She was just - she was amazing. She was really fun, really tall."

He also admitted that they haven't talked about maybe working together in the future: "I don't know. I didn't even think about that - I was more concerned with the fact that I was going up on one of those pop things on stage. I was more thinking, 'S**t, I'm gonna fall over'. No, I haven't spoken to her about that."

Watch footage of their live duet below: