She may be only 14 years old — we're talking not even old enough to drive — but The Voice's Brynn Cartelli managed to own Tuesday night's (April 3) Knockout Rounds, putting forth a beautiful Rascal Flatts cover that did Team Kelly Clarkson proud.

(A briefer: We're now finishing up the Knockout Rounds for this season of The Voice. For the first time ever, former season winners will serve as mentors to help team members prepare their performances; Clarkson enlisted Season 3 winner Cassadee Pope to help out.)

When Cartelli prepped for her rendition of the Flatts' "Here Comes Goodbye," it seemed like a difficult choice for such a young singer to tackle. The song is a heartrending and frankly depressing ode to the pain of ending a serious relationship, a situation the teen hopefully hasn't experienced yet in her short life. In other words, this is not a song that can be dialed in.

Regardless, she handled the performance with extraordinary heart and soul, getting rousing cheers from the audience—and an "Aw, yeah," from her coach—the minute she hit the (gender-flipped) line "He usually comes right in." From there, she added an appealing and mature mix of slight hoarseness and an unusual vibrato technique to overall wow the entire panel of coaches.

The teen's competition was the slightly older Jamella, who also chose a country favorite: "Girl Crush," by Little Big Town. Although she did the song proud (Coach Blake Shelton praised her for making it her own), she was unfortunately eliminated.

We'll be keeping an eye on Season 14's doings every Monday and Tuesday. And, we'll be moving on to the Live Playoffs next week! So be sure to check in to see how your picks are shaping up.

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