The winner takes it all: Brighton, 1974

Swedish pop group Abba, performs during the the Eurovision Song Contest 1974 with their song Waterloo. © Olle Lindeborg/AFP/Getty Images

Swedish band ABBA perform their crowd-pleasing hit Waterloo at the Eurovision Song Contest in Brighton, 1974, which won them the competition.

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Despite setting a unique trend, the band’s quirky costumes were a ruse for tax avoidance. It was recently revealed that the band could claim their costumes on expenses, so long as they could not possibly be worn out on the street.

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Band member Björn Ulvaeus later claimed, “Nobody could have been as badly dressed on stage as we were”.