Kate, 39, wore a loose-fitting navy dress with diamantes and a deep v-neck and completed her look with a turquoise pendant necklace, black strappy heels and a silver clutch bag.
Sharon chose a vibrant orange gown and array of jewels for the South American event which she attended with her boyfriend Martin Mica.
Sharon, 55, has been dating Argentinean model Martin, 27, for a year after they met at an event by Vogue Brazil in Sao Paolo.
Pregnant Fergie dressed her baby bump in a smart white shirt and suit jacket, adding sparkle to her outfit with a pair of large earrings and bright blue nail polish.
Staying true to her chic style Dita Von Teese wore a sleek grey dress with bejeweled sleeves and a burgundy belt.