Relive the sweet blonde singer's performances
Updated: Wednesday Apr 30, 2008 | 02:00 PM EDT
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Relive Allen's performances of Michael Jackson, Donna Summer, Kanye West and more
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Simon likened her performance of the Mariah Carey song to "ordering a hamburger and only getting the bun." We'd like to remind him of this rule: Do not mix proteins and carbs.
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