Katy Perry goes nearly naked wearing cut-out black dress in Paris

Katy Perry left little to the imagination as she stormed the runway at Vogue World: Paris Sunday.

The former "American Idol" judge showed some serious skin wearing an archival Noir Kei Ninomiya gown during a surprise appearance at Place Vendôme.

Perry, 39, turned heads in the cut-out number which featured geometric print designs stitched across her body, with billowing peach and black tulle embellishments woven into a thick skirt.

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Her harnessed gown included zippered edges, and she wore a pair of laced-up, black leather boots on the catwalk. 

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Perry's dark brown hair was slicked back and styled by Dimitris Giannetos, and makeup artist Michael Anthony focused on a smokey eye using pink and gold Path McGrath shades for the "Firework" singer.

Backstage, the "I Kissed a Girl" singer received a few pointers on her supermodel walk with help from FKA twigs and Cara Delevingne. 

"Just make sure it looks like you're going somewhere, but not in a pop star way," FKA told Perry.

"I've only ever been a pop star," Katy responded.

On TikTok, Perry looked nervous as she sipped a glass of champagne post walk. 

"I modeled it," she told her followers. "Anna said model, and I said … "

Perry stormed the runway nearly one month from her final appearance as a judge on "American Idol." The "Roar" singer sat on the esteemed panel for seven years.

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"I mean, I love ‘Idol’ so much … It’s connected me with the heart of America, but I feel like I need to go out and feel that pulse to my own beat," she told Jimmy Kimmel on his self-titled late night show in February.

She noted that her fellow judges Luke Bryan and Lionel Richie were aware that she had "some things planned for this year."

"So it’s going to be a very, very exciting year … for all popstar gillies," Perry said.

Last week, Perry announced her new single hits airwaves in July, titled, "Woman's World."