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	Call it the battle of the virtual burger babes. In one corner, there's Kim Kardashian, the sexy cable star, eager to chat via webcam with Carl's Jr. customers on "The Ultimate Salad Lunch Date" at www.facebook.com/carlsjr. In the other corner, there's Burger King's "Shower Babe," an anonymous 20-year-old from South London. Folks can watch and hear her online while she showers in a bikini and sings. Viewers are asked to vote for what song she'll sing — and what bikini she'll wear — the next day.