MARY KATE-OLSEN has unveiled a dramatic new look - she is now a platinum blonde. The 18-year-old is a huge fan of fashion and regularly likes to experiment with her image. Her colourist, LORRI GODDARD-CLARK, tells American publication Us Weekly, "She just wanted a change. She's very playful. "It's a 1960s bohemian blonde, and she's very bohemian in style!" Meanwhile, Olsen's twin sister, ASHLEY, who normally has the lighter coloured hair, has switched to a deep brown hue. Goddard-Clark, who also colours Ashley's hair, adds, "It's really rich and brings out her amazing blue eyes."