Demi Lovato is a "Stone Cold" knock-out.

In an adorable video shared on the pop star's Instagram page on Friday (February 17), the singer shows off her fighting skills in a quick jiu-jitsu match between her and her MMA fighter boyfriend, Guilherme "Bomba" Vasconcelos.

Captioning the clip with a playful "When you kick bae's ass," the artist takes her beau down—he taps out as she gets his arm locked between her legs—before the two sweetly embrace on the gym's mat.

Watch Demi kick her bae's butt, below:

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