Swedish pop group Abba with from left Anni-Frid Lyngstad, Agnetha Faltskog and Bjorn Ulvaeus performs on stage during a concert at Gamleby Folkpark in Vastervik, Sweden, July 9, 1975, during Abba Folkpark Tour 1975.. Photo: Christer Kindahl / Kamerabild / TT News Agency / Code 3019.
Swedish pop group Abba with from left Anni-Frid Lyngstad, Agnetha Faltskog and Bjorn Ulvaeus performs on stage during a concert at Gamleby Folkpark in Vastervik, Sweden, July 9, 1975, during Abba Folkpark Tour 1975.. Photo: Christer Kindahl / Kamerabild / TT News Agency / Code 3019