Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad created the Swedish pop quartet ABBA in Stockholm in 1972. The group’s name is a palindrome made up of the initial letters of the members’ first names. They were one of the most popular and successful musical groups of all time, becoming one of the best-selling music acts in the history of popular music from 1974 to 1983, and again in 2021.