"Fine Line" is a song from Paul McCartney's 2005 album, Chaos and Creation in the Backyard. McCartney plays all the instruments on the song including drums, bass, and piano. It was released 29 August 2005 as the first single from the album in the UK. It reached number 20 on the UK Singles Chart, McCartney's last top 20 solo single in the UK as of 2018, and number 31 on the US Adult Contemporary. It also reached number 1 in Japan.