#7 Bjorn Ulvaeus, Agnetha Faltskog, Anni-Frid Lyngstad and Benny Andersson of the pop group ABBA dance across the Concord Pavilion stage during a rare 1981 concert in Walnut Creek, California.

ABBA: The Swedish Pop Sensation of the 1970s that Rocked the World

#7 Bjorn Ulvaeus, Agnetha Faltskog, Anni-Frid Lyngstad and Benny Andersson of the pop group ABBA dance across the Concord Pavilion stage during a rare 1981 concert in Walnut Creek, California.

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