Back in their '90s heyday, the Spice Girls were unstoppable. Their individual style choices and Britpop-tastic attitude aimed a defiant kick at the cultural status quo, defining a new era of British creativity and challenging the male-dominated music industry to change. With their unapologetic energy and knockout charisma, they launched a global pop-culture tidal wave, while their rallying cry of 'Girl Power!' changed the face of feminism almost overnight.