"In my honest opinion we looked like nuts in those years. Nobody can have been as badly dressed on stage as we were."

Writes Björn Ulvaeus of Abba, explaining that a motivation for the costumery was that they wanted the cost of the clothes to be tax deductible and that meant that they'd need the Swedish government to accept that their assertion that these things were not also usable as street clothes.

And this was in the 1970s, the decade when people wore the strangest clothes.