Barbra Streisand in Arnold Scaasi, 1969

Barbra Streisand backstage at the 41st Academy Awards in April 1969, the night she tied with Katharine Hepburn for Best Actress, Streisand for Funny Girl. Arnold Scaasi's sequined bell-bottom pantsuit came with a prim white Peter Pan collar and cuffs, but under the stage lights and camera flashes the black net turned see-through, and Streisand later said she had no idea it would. It was one of the first great Oscar wardrobe shocks, and the reason trousers and sheer fabric both have a place in this history.