The Swedish quartet ABBA went down in history of music both as the most famous Scandinavian band and as one of the most successful projects in the history of pop music. The group was formed in 1972 and comprised four performers with the names Agnetha, Björn, Benny and Anni-Frid, whose first letters gave the name to the band. ABBA remained active for ten years, during which the musicians released eight studio albums. ABBA songs topped the charts for the entire duration of its existence. The band’s success was such that even after it broke up its albums continued to sell many copies and its songs remain in rotation on major radio stations.