"Birthday" is a song written and recorded by Icelandic band The Sugarcubes for their 1988 debut album Life's Too Good. It was their first international single and the first single released from the album. The Icelandic-language version "Ammæli" was released on the Iceland-only single Einn Mol Á Mann (One Cube Per Head) the previous year and was included as the B-side on the international single.
After "Birthday" became the single of the week in Melody Maker magazine and NME in August 1987, and was selected as number one in John Peel's Festive Fifty list, the band attained worldwide recognition and success.
A notable cover of this song has been recorded by The Mars Volta (2008).