Keith Urban surprised the audience on today's "The Ellen Degeneres Show" by making a big "American Idol" announcement. "Well, of course Randy's leaving ... and I'm here to announce today that I'm going to be replacing Randy ... bittersweet, really. I'm going to miss Randy, I gotta say. He's a beautiful part of that whole institution that is 'Idol,'" he revealed. Watch the appearance below!
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