Katharine McPhee Gets Soaking Wet In Underwear For 'Earth Day'

Katharine McPhee shows off her insane beach body!

The triple update shared to her Instagram account Wednesday showed the singer getting wet in her lingerie as she splashed around in the water.

McPhee was at Malibu beach, wearing a white t-shirt and matching briefs, which were soaking wet and the thin fabric showcased her underwear underneath. She treated her audience to a great look at her fit figure while clad in a set from MINDD.

The "Scorpion" star rocked a tight black bra with a deep V neckline that offered a glimpse of her shapely bust. Her undergarment had a flat set of straps that showcased her toned shoulders and arms. Its tight fit squeezed her assets, making her cleavage pop.

McPhee teamed the look with a pair of panties. The bottoms were the same color and style as her bra, and they hugged her hips tight. The low-rise design allowed the actress to show off her slender thighs while highlighting her trim midsection. The front of the panties sat low on her torso, which helped emphasize her abs.

The 38-year-old kneeled on the shallow part of the ocean with her lower thighs down to her feet submerged in water. In the first pic, she parted her thighs and ran her fingers through her wet locks as she smiled at the camera. The soft glare of the sunlight highlighted her face and most of her upper body.

A swipe to the right showed McPhee raising her arms as she let her fingers comb through her hair. The third slide looked like a candid shot of the "Smash" alum walking in the water while smiling brightly.

In the caption, McPhee mentioned "Earth Day," and her collaboration with MINDD.

"Happy (almost) Earth Day! ?" she began.

McPhee continued, "I love that each year, this day is meant to remind us that we should all try & do our part to take better care of the planet that generations to come will inhabit. Like our kids!" adding, "While several environmental causes are important to me, I’m probably the most passionate about ocean conservation, which is why I’m super excited to share that I’ve teamed up with my family at @minddbra to launch our Oceana Collection, featuring MINDD bras, underwear & bodysuits in our popular (and previously sold out) cobalt color. 10% of the sales of this collection will be donated directly to @Oceana – a non-profit near & dear to my heart, dedicated to preserving & restoring the world’s oceans."

The "Country Comfort" star also noted, "These photos – which were captured by the incredibly talented @rikerbrothers, on location in Malibu for @minddbra last Fall – remind me how grateful I am to be working with a female-founded bra company that is deeply committed to sustainability. I had such a blast shooting in the Pacific Ocean, & I’m so grateful to organizations like @Oceana for everything they do to preserve it."

Plenty of her followers didn't hesitate to share their love for McPhee's newest upload by clicking the like button more than 34,000 times in less than a day of being live on the popular photo-sharing app. Her ardent ardmirers also flocked to the comments section to leave over 390 messages, and the majority of them wrote compliments.

"Ummm wowwwww ????" Nicole Williams English commented.

While lyricist Carole Bayer Sager called McPhee "Hot!!"

Another smitten admirer added, "Ohh my Gorgeousness!!! Excuse me while I pick my jaw up off the floor ."