"Rock an Roll", also known as "The Hey Song," is a song performed by British glam rocker Gary Glitter that was released in 1972 as a single and on the album Glitter. Co-written by Glitter and Mike Leander, the song is in two parts: Part 1 is a vocal track reflecting on the history of the genre, and Part 2 is a mostly instrumental piece. Both parts were popular in Britain, and the single went to #2 on the British charts. In concert, Glitter merges both into one performance.