'The Voice': Carter Rubin's Knockout Round Performance Brings Kelly Clarkson and Gwen Stefani to Tears

Kelly Clarkson’s divorce from Brandon Blackstock just got a whole lot messier.

It’s beginning to look a lot like Christmas on “The Voice”.

Carter Rubin has wowed the coaches on all season, and on Tuesday's show, he'll find out if he's headed to the finals!The 15-year-old crooner from Shoreham, New York, delivered the final performance of the night on Monday's live semifinals show, and it was a doozy.

Carter Rubin is doing his best to make it to “The Voice” finals!

Carter Rubin is doing his best to make it to finals!The 15-year-old crooner took the stage during Monday's live semifinals to showcase his stage presence and jaw-dropping range, with a cover of «Rainbow Connection» from that had coach Gwen Stefani in tears even in rehearsal!«Blake's mom literally keeps texting me, like, 'I hope your boy gets through!'» Gwen told the young singer, adding that she picked «Rainbow Connection» as a song she sings to her own boys at home.

Gwen Stefani took to stage during Monday's live performances to show off her new single!The season 19 coach debuted her nostalgic new song, «Let Me Reintroduce Myself,» on Monday, with a lyric video that channels several of her old eras.

Blake Shelton, Gwen Stefani, Kelly Clarkson and John Legend are done sending people home -- viewer voting will determine which of the singers will get to move on to the finals and eventually compete for the season 19 crown.However, all is not equal between the season 19 coaches.

Back before they had their own hit duets — and happy holiday memories together — Blake Shelton and Gwen Stefani shared the stage for a Christmas classic!

Blake Shelton and Gwen Stefani shared the stage for a Christmas classic!On Thursday's, Blake and Gwen looked back at one of their first performances together, on season 7's holiday show back in December 2014 -- when they took the stage alongside fellow coaches Adam Levine and Pharrell Williams to perform «Have Yourself a Merry Little Christmas.»«It was my first season, and it was really amazing, because each coach brought their own style,» Gwen shared.

Carter Rubin has wowed the coaches all season long on “The Voice”— and Monday’s live shows were no different!

After weeks of pre-taped shows of The Voice, Blake Shelton and Gwen Stefani returned to their red chairs as a newly-engaged couple. During the first live show of season 19 on Nov. 30, Blake didn’t shy away from referring to Gwen by her new title, now that she’s no longer just his girlfriend. While joking around with a few contestants who had just performed, Blake caught viewers’ attention by saying, “Not to be weird…my fiancée’s out there!”

Carter Rubin has wowed the coaches all season long on — and Monday's live shows were no different!The 15-year-old crooner took the stage to show off his jaw-dropping range once again, with a cover of Mariah Carey's «Hero» that left coach Gwen Stefani brushing back tears.«I'm just so honored to get to know you,» Gwen gushed. «You're so talented -- he just turned 15, he was 14 a second ago -- and it's so fun to watch you shine and know that you're good at that.

 live shows are here — which means Gwen Stefani can finally sport her engagement ring from Blake Shelton on the singing competition show!The season 19 Blind Audition, Battle Rounds and Knockouts were all taped before Stefani and Shelton went public with their happy news in October, which means the live shows are the first time the No Doubt singer has been rocking her epic sparkler on the show.Even host Carson Daly had to say something. He found his opportunity when he introduced country crooner

Blake Shelton, John Legend, Gwen Stefani and Kelly Clarkson — plus, how you can cast your vote for the 4-Way Knockout winner, who will be revealed on Monday's live show!Taryn wowed the coaches with her Blind Audition performance of Martina McBride's «Anyway,» earning chair turns from Blake, Gwen and Kelly — who was blocked by Blake.

The Knockout Rounds are in full force on season 19 of “The Voice” — and everyone’s getting emotional!

Gwen Stefani was under quite a bit of pressure on The Voice recently, and she almost couldn’t handle it.For a recent Battle Round, season 19 contestants Carter Rubin and Larriah Jackson performed a duet of Meghan Trainor and fellow coach John Legend's "Like I'm Gonna Lose You." After the talented teenagers earned a standing ovation, coach Kelly Clarkson jokingly turned to Gwen and told her how “screwed” she was now that the No Doubt singer had to pick only one to advance.