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How to Activate Its Power: For traditional formality, pair it strictly with a crisp white shirt and a matching black tie, for a cutting-edge aesthetic, consider a dark, tonal dress shirt for a sleek monochromatic profile

Who: Diana, Princess of Wales When: 1994 Where: Arriving for a party at Londons Serpentine Gallery in a dress by Christina Stamboulian (dubbed the revenge dress), on the night that Prince Charles publicly confessed to his affair with Camilla Parker Bowles

Her gorgeous wedding gown was created by African-American fashion designer Ann Lowewho didn't receive credit for the dress until much later in lifeand is now on display at the Kennedy Library in Boston

Pair that up with some faded jeans, running shoes, and a T-shirt, and you fit right in any tech startup office