EXCLUSIVE: Designer Mark Zunino Reveals Sneak Peek of Britney Spears' Billboard Music Awards Costumes

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Britney Spears is going to be one stunning starlet at the 2016 Billboard Music Awards!

Ahead of Sunday's award show, designer Mark Zunino exclusively showed ET the outfits he custom-created for the "Perfume" singer's performance.

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One of those quickly created yet incredibly detailed looks is a ruby red jacket that features two slits in the front, a cinched-in waist and bedazzled hardware, which Zunino has styled with sky-high scarlet boots.


Zunino is also dressing Spears in a sparkly one-piece number that consists of a glitzy collar and red, purple and gold embellishments from top to bottom.

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"There was an enormous amount of hand-beading involved with many of the pieces," he told ET. "Britney's body is so toned that we were able to forgo using nude illusion and were able to have hand draped crystals swaged on her actual body."


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Earlier this week, Zunino shared a few close-up photos of the top's intricate detailing to his Instagram page, as well as a few pics of some of the seamstresses hard at work on the costumes.

"The costumes had to be completed within one week, so we had to work around the clock -- six seamstresses working 24-hour shifts for five days straight," he told ET.

Spears, who will be receiving the Billboard Millennium Award and opening the show with a medley of her greatest hits, also took to Instagram to share her own sneak peek looks from rehearsals.

"Another hot day at rehearsals! Whoop whoop!" she captioned one of the snaps.

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In addition to Spears, Justin Bieber, Kesha, DNCE, Fifth Harmony, The Go-Go's, Ariana Grande, Rihanna, Nick Jonas, Demi Lovato, Meghan Trainor, Gwen Stefani and Blake Shelton are a few of the other artists set to perform on the Billboard Music Awards stage.

As we patiently wait for the awards show to kick off Sunday at 8 p.m. ET on ABC, watch the video below to hear more on how Shelton and Stefani are gearing up for the highly anticipated performance of their country duet, "Go Ahead and Break My Heart."