"Happy Birthday" is a song by Scottish band Altered Images, released as a single from their 1981 album of the same name.

The song entered the UK charts in September 1981 and peaked at number two the following month, holding that position for three weeks.

It was the 15th-best-selling single in the UK in 1981 and has been certified silver by the BPI for sales in excess of 250,000 copies.

Accordingly, the band chose Rushent to produce their next album, Pinky Blue (1982), in its entirety.

in 2008,[15] by the Wedding Present for their 1993 compilation album John Peel Sessions 1987–1990,[16] and by Thomas Fagerlund (The Kissaway Trail) with Christian Hjelm (Figurines) for the Danish radio programme Det Elektriske Barometer (The Electric Barometer) in 2010.