ABBA was a pop music group formed in Sweden in 1972, consisting of Anni-Frid Lyngstad (Frida), Björn Ulvaeus, Benny Andersson and Agnetha Fältskog (Anna). Fältskog and Ulvaeus were a married couple, as were Lyngstad and Andersson during their career, 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 1982.
ABBA gained international popularity employing catchy song hooks, simple lyrics, 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. Touring became a contentious issue, being particularly cumbersome for Fältskog, but they continued to release studio albums to widespread commercial success. At the height of their popularity, however, both relationships began suffering strain that led ultimately to the collapse of first the Ulvaeus-Fältskog marriage (in 1979) and then of the Andersson-Lyngstad marriage in 1981. In the late 1970s and early 1980s these relationship changes began manifesting in the group's music, as they produced more thoughtful, introspective lyrics with different compositions.
ABBA remains a fixture of radio playlists and is one of the world's best-selling bands, having sold over 375 million records worldwide, making them the second best-selling band in history and the second best-selling pop artists in history. They still sell two to three million records a year. ABBA was also the first pop group from mainland Europe to enjoy consistent success in the charts of English-speaking countries, including the United Kingdom, the United States, Canada, Ireland, South Africa/Rhodesia, Australia and New Zealand.
After ABBA split, Andersson and Ulvaeus achieved success writing music for the stage while Lyngstad and Fältskog pursued individual solo careers with varying success. ABBA's music remained steadily popular until several films, notably Muriel's Wedding and The Adventures of Priscilla, Queen of the Desert, revived interest in the group, spawning several tribute bands. In 1999, ABBA's music was adapted into the successful musical Mamma Mia! that toured worldwide and had a movie version released in 2008, becoming the highest grossing film in the UK ever. The group will be inducted into The Rock and Roll Hall of Fame on 15 March 2010.
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