This star is shining bright like a diamond.

Hailey Bieber showed off some serious bling as she attended Michael Rubin’s star-studded Fourth of July party in the Hamptons on Monday night, wearing six figures worth of Tiffany & Co. diamonds along with her sexy white dress.

The 26-year-old model shared some Instagram snaps of her look at the summer’s hottest party, wearing a form-fitting halterneck dress ($510) from Maygel Coronel featuring a ruched front and high slit.

But the real star of the show came in the form of her dazzling diamond jewelry, with Justin Bieber’s wife donning a bevvy of layered necklaces including Tiffany’s Victoria Vine ($139,000), Victoria Alternating Graduated ($99,000) and Victoria Graduated Line ($72,000) styles in her Instagram post.

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Bieber glowed as she showed off the back of her sexy dress.haileybieber/instagram

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The Biebers appeared to be deep in conversation at the celeb party.Elder Ordonez 

She completed her blinged-out look with $56,500 diamond cluster drop earrings from the luxury label in a photo of herself getting ready for the party captioned “all smiles over here 😄 except for Piggy. 🙃,” referring to one of her dogs.

In the post, her pup looked less than pleased, but Hailey beamed as she shared several selfies of her white party look, wearing her hair in an updo with loose tendrils framing her face.

Along with her gems, the Rhode founder accessorized with a white Prada purse ($3,700) and Gianvito Rossi heels ($676, originally $845) with a clear strap across the front.

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She pre-partied in a TikTok clip ahead of the event with pals Kendall Jenner, Kim Kardashian, Justine Skye and Lori Harvey.Lori Harvey/TikTok

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Hailey pulled a funny face in one pic, showing off her French mani in the process.haileybieber/instagram

Hailey seemed to be enjoying herself ahead of the event in a clip from Lori Harvey’s TikTok, strutting along with her pals Kendall Jenner, 26, Justine Skye, 27, and Kim Kardashian, 42 — who embarrassingly turned up in the skirt-and-top version of the dress Kanye West’s 24-year-old ex-girlfriend, Chaney Jones, wore to the same party.

Husband Justin Bieber, 29, wore an oversized white short-sleeved sweater with baggy white trousers at the celebrity-filled July 4 bash.

This isn’t the first time in recent days that Mrs. Bieber has rocked some serious jewels, with the skincare guru wearing the same $99,000 necklace she sported at the white party for her brand’s first anniversary dinner last month.