Story highlights The finale aired one night after the "American Idol" finale
There is a connection
This story contains spoilers for the finale of Season 14 of "The Voice."
(CNN) It's already been a week for competition reality show finales, and on Tuesday, "The Voice" made some history.
The Season 14 champion is 15-year-old Brynn Cartelli -- the show's youngest winner ever.
The teenager was mentored by judge Kelly Clarkson, which seemed a bit of karma, given that "The Voice" finale on NBC came one day after "American Idol" crowned its first winner for the ABC reboot of that series.
Clarkson, who won the first season of "American Idol," joined "The Voice" this season as a coach after serving as an adviser during Season 13.
Cartelli, a native of Longmeadow, Massachusetts, was 14 when she auditioned for the show. The finale found her competing against Britton Buchanan, an 18-year-old from Sanford, North Carolina.
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Congratulations are in order for Brynn Cartelli!
The fan-favorite contestant of season 14 — known for her mature sound and style — was crowned the winner of The Voice on Tuesday. The 15-year-old officially becomes the youngest finalist to win in series history as previous teen winners were Danielle Bradbery (season 4) and Sawyer Fredericks (season 8), both 16.
Cartelli’s win marks the very first victory for first-time coach Kelly Clarkson.
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Brynn Cartelli Tyler Golden/NBC
“Kelly behind the scenes is the same way you see her on camera. She is hilarious. She’s really real and caring. I’ve always looked up to her and now that I can get advice from her, it’s incredible,” Cartelli said.
“I’m gonna be Brynn’s big sis for life. One just because I love her parents. We would totally barbeque. She’s kind of stuck with me regardless if she desires it or not,” Clarkson joked. “I love being her friend, I love being her mentor and being her cheerleader.”
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Brynn Cartelli and Kelly Clarkson Trae Patton/NBC/NBCU Photo Bank/Getty
The star-studded evening featured special performances by Jason Aldean, James Bay, Big Sean, Florence + The Machine, Halsey, Dua Lipa and season 13 winner Chloe Kohanski. Cartelli was paired up with one of her idols Julia Michaels for a medley of “Issues” and “Jump,” and it couldn’t have been a better match.
As the youngest contestant on this season at 15 years old, the Massachusetts native balances her love for music with her busy school schedule and love for sports like lacrosse.
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Brynn Cartelli wins The Voice Tyler Golden/NBC
RELATED VIDEO: Kelly Clarkson Backstage
Establishing herself as a growing musician in her hometown through school talent shows, Cartelli enjoyed playing at local coffee shops and smaller venues before finding success on The Voice.
Cartelli auditioned not one, but two times — once in New York and then in L.A. — before taking the stage in front of the judges and getting a four-chair turn from during the blind auditions. She picked Clarkson because she said she has always been a fan of the “Piece By Piece” singer.
RELATED: Kelly Clarkson Made Her Fellow Voice Coaches Handmade Quilts — But Jokes ‘Don’t Look 2 Closely’
Brynn Cartelli and Britton Buchanan
“[Kelly has been] setting me up for a future after the show so that everyone has an idea of who I am as an artist so that the fans who followed me on this journey get what they deserve from me, which is a pop/soul style of music,” Cartelli previously told reporters about what kind of coach Clarkson is, having been down this singing competition path, herself, when she won the first season of American Idol in 2002.
“She’s so encouraging and down to earth,” Cartelli — who just released her first single “Walk My Way” — said.
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The Voice Trae Patton/NBC/NBCU Photo Bank via Getty
Cartelli beat out Team Blake Shelton members Kyla Jade and Spensha Baker, and Team Alicia Keys‘ Britton Buchanan.
Baker finished in fourth place, Jade came in third and Buchanan was named the runner-up.
