Bjorn Ulvaeus 77, Anni-Frid Lyngstad, 76, Benny Andersson, 75, and Agnetha Faltskog, 72, have not been seen all together in public since their last live performance together, on Swedish TV, in 1986.
The band split in 1982, with their last public performance coming three years later on a Swedish version of This Is Your Life, which honoured their manager Stig Anderson.
Benny was all about the summer theme as he rocked a super flowery coat to add a dash of colour to his black outfit.
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