1970s pop group ABBA was known for many things including their extreme outfits. Decades later Simon Bowers uncovered the reason for the iconic style:

• The Swedish tax code allowed the cost of outfits to be claimed as a tax deduction…as long as the outfits were too ridiculous to be worn on a typical day.
• This quirk in the code help contribute to ABBA’s style and gave a distinct personality to the group.
• Björn Ulvaeus (extreme left) states that he felt the group “looked like nuts” and was “badly dressed”.

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Source: The Guardian