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A day after Paula Abdul announced she was leaving American Idol, the show's producers contacted Victoria "Posh" Beckham about filling the judge's spot at next week's Denver auditions. She was downright giddy: "When I got the phone call, I just couldn't believe it," she told Ryan Seacrest on Friday. "I'm still grinning from ear to ear, and I'm going to try hard to pout and not shatter the illusion that I'm a moody cow, but I don't know if I can—I'm just so happy." She wants to maintain Abdul's role as the "really sweet" judge, she says. "I know how it feels to be stood there and be judged and how it can feel when nerves get the better of you." In fact, she's anticipating some nerves of her own sharing the table with legendary curmudgeon Simon Cowell. "He is the only man in the music industry who turned down the Spice Girls and said, 'We would never work,'" she said. "But I have so much respect for him."