"You set this stage on fire!" said Aguilera, calling her artist a "gem" and "force of nature."
She added, "You have the ability to take this whole competition."
Levine then voiced his thoughts about Lee's talent.
"If anyone is in the position to win this thing, your voice has to do that," Levine noted. "[You're] this tiny little thing and this voice comes out of you like a dragon. It's a crazy thing and it takes us all by surprise every time. It was pretty beautiful. Amazing."
Levine's artist Tessanne Chin wowed the crowd with a rendition of "My Kind of Love" by Emeli Sande.
"This woman comes here and sings in a way that is so kind of emotional and flawless at the same time... Every time I listen to you sing, my mind is just blown -- every time," Levine explained. "As far as this competition is concerned, it is calledThe Voice, you've got it in spades to a degree that is pretty astounding... It was very emotional, very real and very raw."
"That was beautiful. There was a lot of passion in that," Aguilera added. "Your voice is so amazing and it's so rich. I feel like it can do really anything."
Aguilera's team member Matthew Schuler sang a stripped down version of "Hallelujah" by Leonar Cohen.
"Wow. There's something so magical," Aguilera said of his voice. "You make people feel so special and it's so rare and you have such a gift. You're so blessed... I'm very humbled and I'm very happy that you chose me as your coach."
"This time last week, I would've told you that I thought Jacquie was the frontrunner on your team. Matthew, gosh dang, man," Shelton said. "Every time you get on that stage, man, it's just magical and it's just powerful."
"You really helped preserve the legacy of what that song means because it was really beautiful," Levine noted.
Shelton's team member Cole Vosbury sang "Adorn" by Miguel with his guitar.
"Every time Cole gets on that stage, I feel like he brings a gun to a knife fight," Shelton explained. "It's unbelievable. It's like more than you would've expected. It squashes you... You blow me away... destroying what you can do with a song."
"I picked Cole in the blind auditions," Green bragged a little bit. "No one else turned around for him... I'm so happy for you. Great job!"
Tuesday night'sThe Voice broadcast will feature the results of last night's home viewer vote and two of the Top 12 artists will be eliminated.