The Queen of Studio 54

Though Bianca Jagger is known for her human and social rights advocacy today, in the '70s she was renowned for her style, not to mention being married to (ahem) Mick Jagger for a majority of the decade. The Nicaraguan-born socialite was friends with Andy Warhol and was a famous jet-setter at Studio 54, once parading through on a white horse for her birthday. She and Mick Jagger married in 1971 when she was four months pregnant, but that didn't stop her from wearing a YSL skirt and shockingly low-cut blazer. Bianca rarely speaks of her style, but she did gush about that. Mick and Bianca partied through the '70s, rubbing elbows with the rich and powerful while the Stones hit their prime. She was friends with designers Halston, Ossie Clark, and Yves Saint Laurent, and made herself a perfect example of soft androgyny - sporting menswear and dramatic flowy dresses alternately. Bianca also wore hats; always with netting, feathers, or velvet to keep it interesting. She was pure disco glamour.