ABBA was a Swedish pop music group formed in Stockholm in 1972, consisting of Anni-Frid "Frida" Lyngstad, Björn Ulvaeus, Benny Andersson and Agnetha Fältskog. Throughout the band's existence, Fältskog and Ulvaeus were a married couple, as were Lyngstad and Andersson - although both couples later divorced. They became one of the most commercially successful acts in the history of popular music, and they topped the charts worldwide from 1972 to 1983.

ABBA gained international popularity employing catchy song hooks, simple lyrics^{[citation needed]}, sound effects (reverb, phasing) 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 ardent fans, notably in Australia.

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