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What's most astonishing about Aiken's popularity is that his fan base, perceived as consisting of teenage girls, actually consists primarily of women aged 30 to 50.  Those teenage girls instead turned their attention in 2003 to two new musical stars, Canadian rocker <b>Avril Lavigne</b> (#51) and sitcom-actress-turned-singer-and-movie-star <b>Hilary Duff</b> (#61).  Out-of-nowhere entertainment stars also included the Russian pop group <b>t.A.T.u.</b> (#39) and the goth-rock ban