Lewis from Swindon performed in Saturday night's episode with his audition song Cry Me Out by Pixie Lott.
It was the third episode of the new series at the weekend, which is open to children aged 7 to 14.
Pixie is joined by Danny Jones and Will.i.am as coaches in the spinning red chairs, mentoring the youngsters as they compete for a £30,000 prize and a family trip to Disneyland Paris.
Just like the main show, The Voice Kids kicks off with the Blind Auditions, with each coach needing to fill a team of 12 singers.
Pixie was singing along to Lewis audition and she told the other coaches: "It's my song!"
Danny and Will then made a pact to turn at the very end so it Lewis didn't automatically go to Pixie.
However, given his song choice, it was little shock when he chose her team to join over those of the guys.
After three weeks of blind auditions on The Voice Kids UK, Team Pixie and Danny both have a total of nine acts while Team Will has the eight.
More of those who won spots on the teams in Saturday's show included 13-year-old Francesca who stunned with an Alicia Keys cover, 13-year-old Nathan from Northern Ireland who belted out Old Time Rock N' Roll by Bob Seger and 12-year-old Erin who wowed with On My Own from the musical Les Miserables.
The Voice UK Kids continues next week at 7:30PM on ITV, Saturday night with the fourth and final round of blind auditions.