Relive performances from Michael Johns, Carly Smithson, Brooke White and more
Updated: Wednesday May 21, 2008 | 10:45 AM EDT
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Relive Allen's performances of Michael Jackson, Donna Summer, Kanye West and more
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Even on a night when 20 contestants sang on the stage, David's version of John Lennon's "Imagine" had Simon saying, "You're the one to beat, and there are 19 very miserable contestants sitting here tonight."
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