This was the first song Mark Ronson and Lily Allen wrote together. After being hugely impressed by a demo he'd heard of "Smile
," Ronson invited her to New York to work with him in the studio. He recalled to The Independent
July 22, 2007 what happened next: "I wasn't a big name at the time, so I got all my air miles to pay for the flight, and put her up at the Holiday Inn in Chinatown. It was at the height of the Sars epidemic, and she ended up checking out and sleeping at a friend's. But she was too shy to tell me. We spent a day together and worked on a couple of things, and went to record shops where I played samples to her. Then I wrote the piano and guitar bit to 'Littlest Things,' and she sat down and scribbled for about an hour and finished the lyrics. We went into the booth to record the song. She originally wanted to do a Mike Skinner (English rapper The Streets) thing, rapping the verse and singing the chorus. But I asked her to sing it all, and she just made up the whole melody on the spot, and sang this amazing solo. At that moment I realized that this girl has a really special gift."