Here's what the judges had to say ...
Randy: One of his favourite songs of all time. It "started out a little pitchy," he said, but added that Lee "found his sweet spot" midway through the song.
Ellen: "Every song you sing you make it your own," she tells Lee, adding, "All aboard the Shania Twain!"
Kara: "You made it your own," she said and points out, "Look how far you've come."
Simon: "Absolutely the right song to pick from Shania's catalogue."
Randy: Thinks Mike found his zone and feels he's really in the zone of who he is. Randy wants him to keep that because "there's a big space for him".
Ellen: Was nervous about it, but it felt like Luther Vandross singing
Kara: She appreciates how greatly he connects with the song and that he changed it enough to make it his own.
Simon: Feels the performance "was a little bit wet" and "girly" for him.
Randy: "One of the best Casey James performance ever", and this could be a great thing in his wheelhouse going forward.
Ellen: Agrees with Randy and encourages him to perform that way from now on even though he has that "Bob Seeger sound".
Kara: Feels that he "didn't hide" and showed vulnerability and rawness.
Simon: Agrees with Randy that this was his best performance and thinks he owes Shania Twain a "kiss on the cheek for that one" [to which Casey obliged].
Randy: Loved the acoustic version and liked seeing her try new things, but not his favourite.
Ellen: Not her favourite either, but "that's like saying, 'What's your least favourite colour of the rainbow?'"
Kara: She agrees with both, but says it's hard for Crystal to be anything but good because she comes from a place of believability.
Simon: "The big story is we don't like Crystal this week," he says. He calls the performance "limp" and "lacking conviction", while the song was "one of Shania's more forgettable".
Randy: Feels this is his wheelhouse and crowns him the country artist on the show.
Ellen: Feels this will be tough because everyone is so good and she couldn't believe the amount of emotion he sang it with.
Kara: Agrees with both and really applauds his effort at changing the line "When we make love" since he is only 17. Aaron admits he was singing it to his mum.
Simon: Feels like Aaron struggled as an artist these last two weeks, but really found his place as an artist this week and for the first time, Simon can really see where Aaron belongs.
Randy: Loves her punk country look and vocals. He feels she "worked it out".
Ellen:: "Way to pull the Shania Twain into the station," she commends.
Kara: "Siobhan is back!"
Simon: Loves the performance, but the last note "felt like you were giving birth up there".
American Idol continues tonight with results at 8pm on Fox
All Pictures: Copyright: Fox