While recording in New Orleans, Karen O's husband Barbaby Clay sent the singer a list of 'Top 50 songs written about New York City.' Karen told NME: "He was like 'you gotta write one.' I wrote this track, which is a love song set on the most New York City thing there is - the metro system."
The only previous song about the Big Apple that the Yeah Yeah Yeah's had recorded was a B-side called "Yeah, New York."
This languidly yearning song utilizes the clanging sound of a train shunting along the subway tracks as an appropriate source of percussion.
Karen O took up bass during the recording of Mosquito and that's her playing the song's swampy riffs.