Overview
- Björn Ulvaeus and Benny Andersson began work on the track in August 1975 on the island of Viggsö, drawing on George McCrae’s “Rock Your Baby” and using the working title “Boogaloo.”
- ABBA first played the song at a gala in the Royal Opera in June 1976 on the eve of Silvia Sommerlath’s wedding, and the widely told story that it was written for her is not supported by the timeline.
- The single was released in Sweden on 16 August 1976 and went on to reach No. 1 in more than a dozen countries; it became ABBA’s only U.S. No. 1 in April 1977.
- Producers note the record’s craft: nearly a year of work across multiple studios, live ensemble tracking, prominent piano licks, a slower-than‑typical disco tempo and heavily layered vocal choirs that give the song its immediacy.
- Fifty years on, the song remains a revenue generator and cultural fixture with roughly billions of Spotify streams, more than 70 known covers, steady licensing and performance income, and retrospective coverage rather than new band activity.