"Bang-A-Boomerang" first released by Svenne & Lotta (both Swedish and English language versions). The track was first recorded as a demo with English lyrics (but without any recorded vocals) in September 1974 by the ABBA musicians for their forthcoming eponymous album ABBA. The song was written by Benny Andersson, Bjorn Ulvaues and Stig Anderson and at one point had the working title "Stop and Listen to Your Heart". The lyrics compare the "message of love" with the returning boomerangs which the Australian Aborigines developed.
In late 1974 Andersson, Ulvaeus and Anderson were invited by Svegires Television as composers to submit a song to the 1975 Melodifestivalen. Since ABBA themselves didn't want to compete in the contest again, just one year after having won, they instead gave the opportunity and the song to Polar Music labe lmates Svenne & Lotta. "Bang-A-Boomerang" was given new Swedish lyrics by Stig Anderson and retitled "Bang en Boomerang" and the duo subsequently made a vocal recording of the track in November 1974 - produced by Björn & Benny - with a different arrangement, most noticeably slightly shorter (2:50) than the original demo, to fit the Eurovision three-minute rule. The song finished 3rd in the Swedish preselections in February 1975, became one of Svenne & Lotta's biggest hits and spent 7 weeks on the Svensktoppen radio chart during the period 9 March-11 May 1975, with a 2nd place as best result. Svenne & Lotta also recorded the song with the original English lyrics, both versions were included on their 1975 album Svenne & Lotta 2/Bang-A-Boomerang (Polar POLS 259). The English version was also released as a single in Denmark and became a big seller there, from a Scandinavian perspective the track is therefore still primarily seen as a hit single and Melodifestivalen classic by Svenne & Lotta. Under the name of "Sven & Charlotte", their original English version was also released in most European countries, and in Oceania, charting in several.