The Cover for ABBA’s biggest hit
What were they thinking?
Benny Andersson, Anni-Frid "Frida" Lyngstad, Agnetha Fältskog, and Björn Ulvaeus
What were they thinking (part II—there was a lot of that going on back then)?
Björn Ulvaeus, Agnetha Fältskog, Anni-Frid "Frida" Lyngstad, and Benny Andersson