The Team Gwen teens faced off during the kick-off of the Battle Rounds on Monday night (Oct. 21).

It’s early in season 26 of The Voice, but Monday night’s (Oct. 21) kick-off of the Battle rounds had the coaches wondering if they’ve already spotted one of this season’s frontrunners. With the blind auditions in the rear view, coaches Gwen Stefani, Snoop Dogg, Michael Bublé and Reba McEntire counseled their teams on strategy, then had the unenviable task of pitting two of their chosen vocalists against each other.

Stefani picked two promising teens on her team, 15-year-old Buffalo, N.Y. native Sydney Sterlace and 19-year-old Pittsburgh singer Sloane Simon, tasking them with taking on Billie Eilish’s “Birds of a Feather.”

Sterlace was up first, appearing a bit nervous as she crooned, “I want you to stay/ ‘Til I’m in the grave/ ‘Til I rot away, dead and buried/ ‘Til I’m in the casket you carry.” Simon proved she was equally up to the task, jumping in on the second verse with airy, confident vocals as she stared down her opponent.

The women then sang directly at each other as they dueted on the song’s wistful chorus, “Birds of a feather, we should stick together/ I know I said I’d never think I wasn’t better alone,” changing places and expertly working the stage as they blended their voices and did their best to stand out during the individual bits with impressive runs and soaring ad libs.

Proud coach Stefani leapt to her feet (along with McEntire) as Bublé told the pair that their singing was “really beautiful” and Gwen admitted that she was totally “momming out right now.” Bublé said he could sense a bit of nervousness in Sterlace’s vocals, noting that she was not as settled as her battle mate, “nor should you be. You’re 15. Besides that your voice was great, I loved that you moved towards Sloan,” he said.

Snoop added that he was “thrilled” with the performance, dubbing both singers “true professionals… do not let the age dictate what you could possibly be because we were all young once upon a time.” Snoop dubbed them equally good, suggesting Stefani shold pick the singer she can “grow with,” even as the No Doubt and solo star lamented, “how can a mommy choose between their daughters?”

McEntire also said she was impressed with both, but suggested that her vote would be for Simon, agreeing that Sterlace has some more years to develop her craft. “You’re gonna blossom like the most beautiful rose ever,” she said. “‘Cause you’re a beautiful bud right now.”

Stefani said her heart was in her throat about the tough decision, recalling that she was blown away by Sterlace’s blind audition and wanted to hear more, while also being stunned by Simon’s “sparkly personality,” confidence and tone. It may have helped that Simon was, literally, wearing a silver sparkle dress with matching stacked heels.

In the end, Stefani focused in on Sterlace’s still-germinating stage presence rather than already established vocal talents. “You have come so far since our rehearsals. I’m shocked,” Stefani said, doubling down on McEntire’s rose bud metaphor. “I keep hearing that word ‘bud,’” veteran toker Snoop joked. Stefani said that the reality was that Simon is “a little bit more ready… you have that star-quality personality.”

Faced with a tough choice, Stefani followed the “weird voice” insider her head and chose Sterlace. And even after McEntire praised Simon’s “voice of an angel,” in her pitch to steal, Sloane ended up choosing Bublé — who also called her voice “angelic” — as her new team leader.

New episodes of The Voice air Monday and Tuesday night at 8 p.m. ET/PT on NBC, and then stream on-demand via Peacock the next day.

Watch Sterlace and Simon face off below.