Gwen Stefani Flaunts Her Abs and Cleavage in Sexy, Sheer Performance Ensemble

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DAYUM, Gwen Stefani!

The "Misery" singer, 46, proved she's ageless (and fearless!) while rocking out onstage at Samsung's 837 Summer Concert Series on Thursday in New York City.

WATCH: Gwen Stefani Goes Full Country in Camo and Overalls, We Blame Blake Shelton

The mother of three donned a super sexy all-black ensemble, which consisted of a high-cut fishnet Death by Dolls leotard over stockings in the same material. Stefani styled the edgy look with a sultry bra top, low-waisted cropped pants and a pleated leather belt that gave off major rocker vibes. Her outfit wouldn't be complete, of course, without a pair of lace-up leather heeled booties, chunky bracelets and her signature red lip.

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But can we all take a moment to seriously praise those rock hard abs?

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The No Doubt frontwoman helped kick off the concert series with DJ Diplo. During Stefani's performance, she belted out a medley of hits from her latest album, This Is What the Truth Feels Like, including "Make Me Like You" and "Misery." She also sang a few of her classics, like "Hollaback Girl," "What You Waiting For?" and "Sweet Escape."

WATCH: Gwen Stefani Debuts Gorgeous 'Misery' Music Video -- See Her Amazing Looks!

On Wednesday, Stefani was a guest on 94.7 Fresh FM's The Tommy Show, where she shut down rumors that she and her boyfriend, Blake Shelton, are getting engaged.

Hear what she had to say in the video below.