“Jazz is such a powerful singer, a great entertainer, and she has such a light,” Bublé remarked to Brown. After McKenzie sang in the rehearsal room, Bublé cracked a joke about his former Battle Advisor Jennifer Hudson’s tendency to throw her shoes at people in excitement when they sing well, saying, “Thank God Jennifer Hudson isn’t here today. There would be shoes coming at you!”
Mega Mentor Zac Brown encouraged McKenzie to work even harder, observing, “Jazz has so much power and swagger too… As incredible as she is, she can do so much more.”
Specifically, he pointed out, “There are some sections where you run out of breath a little bit. You’re doing these long runs. They require a lot of air.” Brown instructed her to breathe into both her midsection and chest together, walking her through a simple exercise: “Do you ever diaphragm breathe? Put your hand on your belly, and when you breathe in, it’s like you’re filling a balloon at the bottom…Practice that and you’re gonna have twice the tank.” Now that’s mentorship!
Jazz McKenzie floored Niall Horan on The Voice Knockouts
Whether it was the tip from Brown or the energy from the crowd, Jazz McKenzie’s performance at the Knockouts was spectacular. “Jazz, you are an exceptional vocalist. You know you’re wrong for doing a Smokey Robinson song like that. You rewrote it. You were devoted and quoted. And that is noted. Michael Bublé, It’s Jazz,” said Coach Snoop Dogg.
“You’re arguably the best singer in this show. It’s amazing that you can do what you can do. It’s so effortless. You don’t even look like you’re trying at all. It makes me sick. It’s not fair!” complained Coach Niall Horan. Added Coach Reba McEntire, “Jazz that was wonderful, great performance. I’ve been in awe because I turned my chair for you along with the other three guys. It was just unbelievable.”
Watch The Voice Monday Nights on NBC!

The Voice Season 28 is in full force, and you don’t want to miss a second of the action. Episodes air Monday nights at 9/8c on NBC and stream next day on Peacock.
The Season 28 Coach lineup is stacked, with Reba McEntire, Snoop Dogg, Michael Bublé, and Niall Horan returning to their red chairs. From the Blind Auditions to the Battles, Knockouts, Playoffs, and Live Shows, the fun — and music! — is truly nonstop. Plus, new rule changes this season are raising the stakes more than ever before.
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Bublé went so far as to tell her, “God’s light radiates through you,” and awarded her the Knockout win. Later, he reflected, “I think Jazz might be one of the greatest singers that I have heard in a long time. She has the massive range. She has power. I think that Jazz could be a frontrunner for this competition.”