ABBA was a Swedish pop group, composed by Benny Andersson, Anni-Frid Lyngstad, Björn Ulvaeus and Agnetha Fältskog. The name "ABBA" is an acronym formed from the first letters of the name of each member (Agnetha, Björn, Benny, Anni-Frid) .1 The quartet was formed in Stockholm in 1972