ABBA was a Swedish Eurovision Song Contest-winning pop music group active between 1972 and 1982. Benny Andersson, Björn Ulvaeus, Anni-Frid Lyngstad (Frida), Agnetha Fältskog are in ABBA. They topped the charts worldwide from the mid-1970s to the early 1980s. The name "ABBA" is an acronym formed from the first letters of each of the group member's given name (Agnetha, Björn, Benny, Anni-Frid).

ABBA gained immense international popularity employing catchy song hooks, simple lyrics, and a Wall of Sound achieved by overdubbing the female singers' voices in multiple harmonies. As their popularity grew, they were sought-after to tour Europe, Australia, and North America, drawing crowds of near-hysterical fans ("ABBAholics"), notably in Australia. Touring became a contentious issue, being particularly unpopular with Agnetha, but they continued to release studio albums to great commercial success. At the height of their popularity, however, both marriages of the band members (Benny with Frida, and Björn with Agnetha) failed, and the relationship changes were reflected in their music, as they produced more thoughtful lyrics with different compositions.

They remain a fixture of radio playlists and are one of the world's best selling bands, having sold around 400 million records world wide; The music of ABBA has been re-arranged into the successful musical Mamma Mia! that has toured worldwide and a movie version was released in July 2008. All four of the former members of ABBA were present at the Stockholm premieres of both the musical (2005) and the film (2008). The film première took place at the Benny Andersson-owned Rival theatre at Mariatorget, Stockholm on 4 July 2008.