Swedish pop group formed in Stockholm in 1972. Lineup: Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid "Frida" Lyngstad. The name is an acronym of the members' first initials. Among the most commercially successful pop acts in history, with estimated worldwide sales exceeding 380 million units.
Nine studio albums between Ring Ring (1973) and Voyage (2021, their first new album in 40 years). Commercial peak: Arrival (1976), The Album (1977), and Voulez-Vous (1979). Won the 1974 Eurovision Song Contest with "Waterloo," launching their international career. The 2008 jukebox musical and film Mamma Mia! introduced their catalog to a new generation. Inducted into the Rock and Roll Hall of Fame in 2010.
