Meet T.A.T.U., Russian teen pop duo and marketing geniuses. See, Julia (left) and Lena know a recipe for fame our squeaky-clean Mandys and Britneys can't cook - they make out with each other. Witness their plot to take over they world via appealing to both men and women, which depends on carefully constructed sexual ambiguity: You can have short hair - but careful, not too butch! Your "partner" should have longer, more romantic, tumbly waves (try Matrix Tuttrix, which can go both ways). Wear playful yet minimal makeup for that is-she-or-isn't-she? mystique (YSL eyeliner Indigo on Julia, Tarte in Plum on Lena), including flushed-pink cheeks (Dior Diorlight in Natural Rose) and glossy wet lips (try L'Oreal's new Endless Liquid Lipcolour in Perpetual Pink), so it's apparent you've been snogging someone. No one needs to know who. Now, kiss your best girlfriend in public and, when a horny asshole asks if you sleep together, shrug innocently. Better yet, answer in Russian.