In a sneak peek at Tuesday's Battle Rounds, Nini Iris and Sophia Hoffman blow the coaches away with Blondie's 'Heart of Glass.'
In a sneak peek at Tuesday's Battle Rounds, Team Niall's Nini Iris and Sophia Hoffman take the stage with Blondie's "Heart of Glass," and leave their coach with an impossible decision following their incredible performance.
"I know that you're battling, but it didn't feel like a battle," Gwen Stefani praises. "It's crazy!"
"Both of you were just in your element," John Legend agrees. "You look like stars up there. The second you came out here, it just looked like, oh, we're gonna have some fun!"
Reba McEntire praises both singers' talent and confidence, giving the slight edge to Nini before turning it back over to Niall -- who struggles with his decision but says he has to go with his gut.
"That was incredible," he raves to his team members. "You sung the roof off this place... I'm really hoping that someone comes up with a steal here."
Watch the full audition below and tune in on Tuesday to see who Niall picks as the winner -- and if another coach does in fact steal the remaining singer!
ET spoke with Gwen ahead of this season's Battles, where she opened up about how surreal it is to return to The Voice without hubby Blake Shelton by her side. The Cowboy departed the NBC singing competition earlier this year, after 23 seasons.
"It feels kind of like [my] first season, before I knew he existed," she shared. "It's kind of weird, but it's also like, I'm having so much fun."
"Like, I'm only here because it's fun," Gwen added. "The coaching and actually getting to know your team after the Blinds is my favorite thing, 'cause it's like, the dream's there."
She admitted, however, that it is a little nerve-wracking to look to Blake's chair and instead see The Voice's newest coach -- the Queen of Country herself.
Of how Reba's handled her first season so far, Gwen recalled the Blind Auditions with a laugh.
"She did great. She didn't have to do anything," she remembered. "She'd be like, 'I think you were great. I'd love to have you on my team,' and then they'd be like, 'I pick you!'"
The Voice airs Mondays at 8 p.m. PT and Tuesdays at 9 p.m. PT on NBC.