ABBA is a Swedish pop group formed in 1972, consisting of members Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad. They gained international fame with catchy songs and harmonies, becoming one of the best-selling music acts in history. Their hits include "Dancing Queen," "Mamma Mia," and "Take a Chance on Me." The group disbanded in 1982 but made a significant comeback in 2021 with new music and a virtual concert experience. ABBA's influence on pop culture is evident, inspiring musicals like Mamma Mia! and numerous tribute acts worldwide.