The song "When" by Showaddywaddy was released in 1977. It was produced by Mike Hurst and appeared on their "Greatest Hits" album. The song reached a peak chart position of number 8 in the Dutch Top 40 and remained on the chart for 7 weeks. The song "When" was originally written by Reardon and Evans and had also been performed earlier by other artists, such as The Kalin Twins in 1958, but Showaddywaddy's version gained popularity in the late 1970s.