Fierce brunette Julia Volkova and sprightly redhead Lena Katina are Eastern Europe's most popular musical exports. In the age of 24/7 televised entertainment, you've likely caught a glimpse (or quite more) of these Russian pop-sensations and full-time mess-with-your-expectations media mavens.During t.A.T.u.'s six years together, the two diminutive, talented beauties have caused one hell of a worldwide ruckus, routinely playing to audiences of 50,000 fans and selling more than 5 million copies of their debut album, 200 km/h in the Wrong Lane.Infamously, they refused to perform at the World Music Awards unless provided with real guns. Explains Lena, "We wanted real machine-guns, but they didn't give us, so we wouldn't perform, that simple."