ABBA was a Swedish pop music group that began in the early 1970's. The band consisted of Benny Andersson, Björn Ulvaeus, Anni-Frid Lyngstad and Agnetha Fältskog. ABBA produced many chart-topping hits like Waterloo, Mamma Mia and Dancing Queen. In the end, the band split leaving us with their wonderful music to enjoy for generations.