After America voted Laine Hardy, Wade Cota, Alejandro Aranda, and Madison Vandenburg into the Top 4, the judges had to decide whether or not to save one of the bottom two votegetters -- Jeremiah and Laci Kaye -- from being ousted from the competition.
This episode marked the last time the judges could take advantage of their one "Save" of the season, so they opted to use it in order to advance Laci Kaye.
Laci appeared in shock and disbelief when Katy announced the judging panel's decision with only seconds remaining of the broadcast. Katy even voiced prior to the announcement how she didn't know which artist to choose.
As a result, Jeremiah was sent packing and the Top 5 artists will perform again for home viewer votes next week.
American Idol's performance show on Sunday night featured the Top 6 contestants performing "showstoppers" as well as hits in celebration of the musical festival Woodstock, which began in 1969.
For the first round of competition, Madison, a 17-year-old high school student from Cohoes, NY, kicked off the show with a performance of "Piece of My Heart" by Janis Joplin in honor of Woodstock.
Katy said she's not a stereotypical pop star because she's able to play guitar and brought that out for her performance.
"You are really getting into the groove! I don't want you to be second. I want you to win this thing, so keep showing your teeth," Katy said.
Luke noted the "sweet and timid little Madison" was rocking her guitar and commanding the stage. He loved to see that she was "digging in more and more each week."
And Lionel said Madison is not just a pretty face because her talent was "showing all over the place" and she showed some real "attitude."
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Laine, an 18-year-old musician from Livingston, LA, took the stage with "I Don't Need No Doctor" by Joe Cocker.
Luke told Laine he continues to pick the right songs for him that complement what he's all about and his voice has "a lane" and a sweet spot to it.
Lionel said Laine's identity is strong and he's reached into the core of who he is.
As for Katy, she told the artist he's figured this chess game out and now is the time to scare himself and push himself out of his comfort zone a bit "into the stardom category."
Jeremiah, a 26-year-old music teacher from Catonsville, MD, sang "Swing Low, Sweet Chariot" by Joan Baez.
Lionel joked about how Jeremiah had brought the house down and he was bringing "the bling and the swing." He called Jeremiah's vocals "amazing" and acknowledged he wasn't even sure what the top of his vocal range is.
Alejandro, a 24-year-old dishwasher from Pomona, CA, performed "White Rabbit" by Jefferson Airplane.
Luke said Alejandro "embodied the spirit of Woodstock" and he had a "rockstar EDM moment."
Lionel told Alejandro to play with the microphone stand more and "make love" to it, and then Katy pointed out Alejandro delivered "a fantastic performance" and he should "keep feeling" himself because it looks good on him.
Katy said Alejandro's heroes would be proud and it was his best vocal performance to date because he had really pushed himself.
Wade, a 27-year-old musician from Phoenix, AZ, sang "With a Little Help From My Friends" by Joe Cocker.
The judges went crazy over Wade's performance, and Lionel said it was as close to a '60s performance as one can get and he chose "the perfect song" and knocked it out of the park.
Katy admitted it was the best performance of the night thus far and Luke said he "elevated the game" and "spiritually moved the whole room."
For the second round of competition, the contestants were mentored by singer Lauren Daigle and asked to belt out showstopping vocals.