"O.N.E." is a song by American experimental rock band Yeasayer. It was released as the second official single from the band's second studio album Odd Blood under Secretly Canadian in the United States and Mute Records in the United Kingdom on March 23, 2010. The song has peaked at number 24 on the Belgian Ultratop Flanders single chart and was also featured in the in-game soundtrack for the video game Grand Theft Auto V.