ABBA Logo | 02 ABBA (formerly named Björn & Benny, Agnetha & Anni-Frid or Björn & Benny, Agnetha & Frida) were a Swedish pop supergroup formed in Stockholm in 1972 by Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad.