I'VE ALWAYS BEEN fascinated by people with great style—where it comes from, how they do it, and what it says about who they are. That's why it has been such a joy to see fashion become a powerful means of expression for so many women around the globe. To wit, Bazaar now has outposts in 28 countries, each with its own distinct sensibility and perspective. For this year's Personal Style issue, we asked our counterparts at Bazaar's Brazilian, Chinese, Japanese, Indian, Middle Eastern, Russian, and British editions to nominate the women who personify the best of fashion in their respective regions. (Our global fashion director and paragon of Parisian chic, Carine Roitfeld, represents France.) Elsewhere in the issue, our cover star, Cameron Diaz, is a deft ambassador of American style—she's…