Bat’s how you do a vacation.

Kelly Osbourne brought a little darkness to a sunny day on the high seas, pairing a crisp white swimsuit with some heavy-metal tributes.

The “Fashion Police” alum, 41, shared an Instagram carousel Thursday from her Euro summer holiday, posing in a pinup-style one-piece, accessorized with layered chain necklaces, a wide-brimmed straw sun hat, and giant bat-shaped sunglasses — a vibe best described as Ozzy meets Audrey.

Kelly Osbourne turned a sunny boat day into a heavy-metal homage on Instagram this week. kellyosbourne/Instagram Her giant bat-shaped sunglasses, by Hood London, winked at her late dad Ozzy Osbourne’s notorious 1982 stunt. kellyosbourne/Instagram The 41-year-old recently got a new thigh tattoo paying tribute to another Ozzy emblem. mileslangford/Instagram The tat, which Kelly got at the London Eye’s new rotating tattoo studio, depicts the rocker’s signature round glasses. mileslangford/Instagram A crisp white one-piece, layered chains and a straw sun hat rounded out the pinup look. kellyosbourne/Instagram

The Hood London sunglasses ($404) nodded to her late father, Ozzy Osbourne, and his most infamous stunt: biting the head off a bat mid-concert in 1982. The Black Sabbath frontman died last July at 76.

“Serving sun, sea, and zero apologies ☀️🌊,” she captioned the post.

The mom of one also flashed her newest ink — her dad’s signature round glasses, tattooed on her thigh — a recent acquisition from the London Eye’s rotating tattoo studio, which opened earlier this month.

She documented the sky-high session in a video, giving the artist a message from her mom Sharon: “Don’t f—k it up.”

The bat shades aren’t her first nod to the Prince of Darkness this summer. In June, she honored him with a bat-shaped fascinator at Royal Ascot, and reflected on the ache of her first Father’s Day without him.

In June, the star honored her late father with a bat-shaped fascinator at Royal Ascot. Getty Images The “Prince of Darkness” died last July at 76. Getty Images

Her thigh piece joins a growing collection — including a lily on her rib cage she debuted in March.

Fans flooded the new post with love. “1950s diva vibes,” one wrote, while another added, “Looking hot hot hot.”

Publicist and longtime pal Kelly Cutrone chimed in with a simple “Love you so much.”

The getaway seems to be giving the star some quality time with her son, Sidney, 3, whom she shares with ex-fiancé Sid Wilson.

Over on her Stories, Osbourne turned sentimental, posting a selfie with the toddler and a close-up of their clasped hands — a peek at the tattoos dotting her fingers, among them “22,” “you,” a tiny tooth and a crescent moon.