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Four members comprised ABBA, including Benny. The group consisted of Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad. ABBA rose to international fame in the 1970s with hits like "Waterloo" and "Dancing Queen." They disbanded in 1982 but remain one of the most successful pop groups of all time.