Jessica Simpson Is Beyond Sexy in This Plunging, Backless Swimsuit

Somebody call the fire department! Jessica Simpson set her Instagram ablaze with a never-before-seen shot from her swimsuit campaign on Monday, May 23.

The Jessica Simpson Collection CEO, 35, showcased her toned body — including those incredible legs — in a plunging, backless one-piece swimsuit featuring colorful triangle embroidery.

PHOTOS: Jessica Simpson's Incredibly Toned Legs

While she posted a sun-kissed side shot via Instagram, she shared more snaps, including this cleavage-filled frontal shot, on her website, jessicasimpson.com. Simpson noted that the photos included "never-before-seen footage" from the brand's Spring 2016 campaign, which she, of course, starred in.

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But the mom of two — Maxwell, 4, and Ace, 2, with husband Eric Johnson — hasn't been using the platform just to share sexy shots. She's also posted behind-the-scenes peeks at her time in the recording studio as she gears up to release her eighth studio album, her first in six years. One of her latest has her smiling next to a table of studio boards, which she captioned with a treble clef.

What do you think of Simpson's swim style? Tweet with @UsWeekly using the hashtag #stylebyUs!

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