Crystal Bowersox shreds "Isn't It Ironic" on "American Idol." It brings out a great tone in her voice and she just owns it.

And then Alanis Morrisette comes out, sounding great as well. This is a really inspired pairing, their voices blend really well. Both have that nasal edge that would drive me insane if I had to listen to it for an hour, but in a three-minute burst it cuts nicely through the claptrap Fox has filled most of the evening with.

PHOTOS: "American Idol" final round | Lee, Crystal and Casey go home | "Idol" top 12 party with "Glee" stars

REWIND: See the winners and top finalists from each season of "American Idol"

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MORE: Read all of our other "American Idol" posts

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