"I'm a Cuckoo" was Belle & Sebastian's second single from Dear Catastrophe Waitress, released on Rough Trade Records in 2004. The track was produced by Trevor Horn. B-side "Stop, Look and Listen" merges into "Passion Fruit" at the end of a song – an instrumental piece which was performed live prior to its release. The front cover features Shantha Roberts. The track fared better in the UK singles chart than previous single "Step into My Office, Baby", reaching #14. A reviewer described the track as being "like the indie pop version of Thin Lizzy", who are also mentioned in the lyrics.