Jessica Simpson turned heads in a completely see-through, sparkling dress to celebrate her 45th birthday with a bang.

In photos, the fashion designer modeled a sheer dress with a glittering mesh overlay at a lavish birthday soirée at legendary Hollywood hotspot Chateau Marmont.

The mom of three layered the jaw-dropping look with a pair of dark briefs and accessorized with platform heels and a sparkling choker.

In several snaps, she pulled a discreet, floor-length silk black trench coat over the skin-baring ensemble.

Mom Tina Ann, 65, posed alongside her daughter for a celebratory snap in an animal-print cocktail dress, and Jessica playfully showed off a two-tier cake topped with a party hat in another pic. In yet another, she posed alongside her all-girl gang of guests.

The “Dukes of Hazzard” actress styled her iconic blonde locks in loose waves and rocked a dramatic makeup glam for the birthday bash on Thursday.

“Fancy dive into 45 💫✨💫” the pop star captioned the pics on Friday.

Followers took to the comments thread to gush over the birthday girl with a slew of compliments.

“Guurllll 45 never looked so good,” wrote a fan, while another exclaimed, “Your Mum looks gorgeous too!”

A third quipped, “forty fine 🔥” while a fourth gushed, “you are BODY GOALS and that hair wow 🔥❤️🙌😍”

The “Take My Breath Away” singer, who split from Eric Johnson after ten years of marriage back in January, previously took to the platform to mark her milestone birthday in a leather bodysuit and animal-print coat.

In a video clip, the singer teased her upcoming single “Fade” while enjoying a bowl of cherries and writing “fade” in red lipstick on a bathtub wall.

“To start off my 45th year’round the sun, Imma gonna bright side the journey of life by choosin’ to be the HAPPY part of my BIRTHDAY,” she captioned the seductive footage on Thursday.

“I’ve been patiently waitin’ for y’all to get a dose of #FADE from the upcomin’ journey through #NashvilleCanyon , Part 2.”

The hitmaker, who famously shed almost 100 pounds a few years ago, also flaunted her svelte figure in a red bikini while celebrating the Fourth of July last weekend.