Michael Buble threatens to quit after 'The Voice' battle: 'This might be the hardest for me'

LOS ANGELES, CALIFORNIA: Michael Buble was in a big dilemma of picking a winner and ended up saying "I quit" after the performances by his team artists J Paul and Kamila Kiehne, who took on Britney Spears' 'Toxic' for their battle on 'The Voice'.

All four coaches of the reality show praised the high-energy homage that J Paul and Kiehne paid to the 2003 pop classic by Spears, according to NBC.

Michael Buble says 'I quit' after 'The Voice' battle between J Paul and Kamila Kiehne

Both the singers for Michael Buble's team brought their best performances in terms of pure entertainment. J Paul brought in his silky tenor while Kamila Kiehne reached deep into her alto register for an amazing vocal performance that complimented the former's refined R&B style, per the outlet.

Buble was aware that he was in for a challenge even before the two took the stage. He said, "This Battle might be one of, if not the, hardest for me. Kamila has a voice that really has a lot more maturity than her age."

He added, "J Paul has one of the most polished voices in the competition… It’s really not gonna come down to who sings the best. It’s gonna be one of those feelings that I have in the moment. It’s gonna be a gut feeling!"

After their performances, Buble said, "I honestly just don’t know what to do. My hands are so sweaty!" and then joked, "You know what? Actually, no — I quit!"

The host Carson Daly humorously brought Buble back on track with a playful tease and said, "Don’t make me call Blake!"

Michael Buble boasts he felt like a 'proud dad' after his team's performances

After the performances by J Paul and Kamila Kiehne, Michael Buble boasted that he felt "like a proud dad."

He said, "Like a young, really handsome, proud dad. Kamila, I mean, wow — you came out here and just crushed it! And J Paul, vocally, you have all the ability in the world."

Buble ultimately chose J Paul as his vocal skills gave him the edge over the 17-year-old Kiehne. J Paul proceeded to knockouts and Kiehne was sent home.

Even though Kiehne was eliminated, she received praise from one of the coaches, Snoop Dogg. The rapper complimented Kiehne for the "range" and "depth" of her voice at her age. He said, "You’re not even at the age where you’re supposed to know how to do all that … you’re ahead of the curve."

Reba McEntire also complimented Kiehne’s voice and said that if the decision was hers to make, she would gone with Kiehne, according to The Wrap.