Kris Allen, Adam Lambert Reinvent Disco On 'American Idol'

Danny Gokey, Allison Iraheta earn praise for vocals on tricky dance classics.By Gil Kaufman Kris Allen performs "She Works Hard for the Money" on American Idol's disco night Photo: Michael Becker/ FOX Just like country night, the disco round of "American Idol" can separate the contenders from the also-rans. And, Tuesday night, that's pretty much what happened. Unlike last week, when the judges had to give their comments in pairs because the previous week's show ran over, this time al...

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