At Hollywood’s hottest afterparty, skin was in.

Plenty of celebrities sported sheer styles on the Vanity Fair Oscar Party 2025 red carpet Sunday night — including Paige DeSorbo, who opted for a sparkly, see-through Maë Paris gown.

But her secret to rocking a skin-baring look seamlessly — Spanx’s Undie-tectable Thong — costs far less than red carpet couture.

The $24 undergarment features the brand’s light compression technology, plus elastic-free edges so visible panty lines won’t be a problem.

In addition to the nude hue DeSorbo donned, the smoothing style’s also sold in 13 other colors ranging from neutrals to bright red.

It’s racked up nearly 1,500 five-star ratings on Amazon, with one shopper remaking that it’s “invisible under pretty much anything.”

“I wish I knew about these many years ago because it looks phenomenal in dresses!” a second reviewer wrote, while a third called it “very comfortable for a thong.”

The “Summer House” star was hardly the only one who dared to bare at Vanity Fair’s big bash; Zoë Kravitz wore a cheeky peekaboo dress, while Olivia Wilde, Julia Fox and Megan Thee Stallion all put their own spin on barely-there dressing.

And given Spanx’s shapewear is a longtime red carpet staple, DeSorbo likely wasn’t the only celebrity wearing some at the afterparty, either.

Katy Perry once shared a video wearing the brand’s bestselling OnCore High-Waisted Mid-Thigh Shorts, while Kylie Jenner snapped selfies in nothing but the SpanxSmooth Bra-llelujah Lightly Lined Bralette in 2022.

These days, the brand’s equally beloved for its comfy clothing — like the AirEssentials Half Zip and Booty Boost Leggings that’ve scored superstar fans like Oprah and Gwyneth Paltrow, respectively.

This article was written by Hannah Southwick, Commerce Writer/Reporter for Page Six Style. Hannah spies deals on actually affordable celebrity-worn styles, puts Hollywood’s favorite labels to the test and finds the beauty products that keep stars red carpet-ready. She consults stylists and industry pros — including celebs themselves — for firsthand product recommendations, trend predictions and more. In addition to writing for Page Six since 2020, her work has been featured in USA Today and Parade.