Gyth Rigdon kicked off the show by performing "Nobody But Me" by his coach Blake Shelton.
John told Gyth he carries himself with "star presence" and his voice sounded very strong.
"Your voice sounds really strong and I really like the way you owned the stage. You act like you belong here!" John told him.
Blake said it's "unbelievable" to him that Gyth is "undiscovered talent" because he performs like a veteran.
Kim Cherry then took the stage with "Whatta Man" by Salt-N-Pepa on behalf of Blake's team.
Kelly said Kim delivered exactly what the coach had expected from her but she'd love to hear Kim flat out sing next time, maybe a ballad or something, without rapping.
Blake thought fans' song choice for Kim was "perfect" and she did "a great job" with the song.
Jej Vinson was given the tune "Close" by Nick Jonas featuring Tove Lo to perform. He represents Kelly's team.
Adam admitted Jej is one of his favorite artists because of his "identifiable" voice and special tone. Adam said he "always envisioned" Jej being in The Voice finale.
And Kelly gushed about how Jef can sustain notes and is a great vocalist but he also executes runs with such style and grace. Kelly said his vocals are "effortless" and sound "angelic but sexy as well."
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"I would be shocked if you weren't in the finale!" Kelly said.
Andrew Sevener sang "She Got the Best Of Me" by Luke Combs for the Top 13 performance show on behalf of Blake's team.
John complimented Andrew on his energy and said he looked so confident and passionate. The coach, however, suggested Andrew could use a little more finesse in his performances going forward.
Blake said Andrew proved how great he is as a singer but also how grateful he is to be on The Voice. Blake noted Andrew's energy is always through the roof because he's "having the time of his life!"
Another "Team Blake" representative, Oliv Blu, then took the stage with "Smooth Operator" by Sade.
John regretted being Oliv's former coach, saying she was so impressive and not only has the voice but "the look" as well. He was impressed by the control and clarity in which she sang the Sade hit.
Blake gushed about how Oliv sounded "absolutely incredible" and came out of her shell, embracing the moment and becoming an artist on the stage for all to witness.
Dexter Roberts, from "Team Blake," was up next, and he was given the song "Something Like That" by Tim McGraw to belt out.
Kelly loved the song pick and said Dexter's voice connected with the audience. Blake added Dexter had one of his best performances to date even though the song may not have boasted all he's capable of vocally.
"Team Legend" member Shawn Sounds was asked to sing "A House Is Not a Home" by Luther Vandross by the fans.
All four coaches gave Shawn a standing ovation, and Adam explained the performance was incredible and he was the best of the night so far. Adam also noted his personality and flare set him apart from the rest of the competition.
"I think you're unbelievable, dude," Adam said.
John agreed it was one of the best performances all season long on The Voice and he's honored to have Shawn on his team.
Adam admitted he missed having Celia on his team and she deserves to be on The Voice. Adam called himself "a huge fan" of hers.
John was proud of Celia for making the song her own given it was so intimidating and just won an Oscar. He thought she dove into the deep end and totally let go.
"Team Adam" member LB Crew from "The Comeback Stage" then belted out "I'll Make Love To You" by Boyz II Men.
Adam expressed how LB is "a true talent" as well as a kind, good human being. Adam said LB is incredibly talented and he performs with all of his being -- every time.
Mari, who also represents Adam's team, was given "Foolish" by Ashanti to sing.
Adam insisted Mari is "a superstar" and "has arrived."
"You are your thing, tried and true, from top to bottom and inside and out," Adam explained.
Carter Lloyd Horne on Blake's team performed "Let It Go" by James Bay.
It was clear the ladies loved Carter, and while Blake was a little bit worried about this song, he said Carter ran at the song "head on" and gave it everything he had. Blake called him "so cool" and said "he killed it."
"Team Kelly" member Rod Stokes sang "When A Man Loves a Woman" by Percy Sledge from his heart.
Blake noted he's so good and he just "keeps delivering something even more monumental than the last time."
Kelly admitted she adores Rod and has a God-given talent he doesn't even need to work for. She said he has a beautiful, majestic thing about him.
And finally, Maelyn Jarmon closed out the show by singing "The Scientist" by Coldplay, representing John's team.
"Oh my God, America. I just said it -- I think she's the best singer in the competition," John insisted. "That skill level it's not normal. It's beyond and we're all blessed to hear it, so thank you."
The "Instant Save" will return on Tuesday night's live results show, and The Voice is only two weeks away from crowning the winner of Season 16 on the finale.