Nicky Hilton bares butt cheeks in bizarre dress

PARIS, July 8 (UPI) -- Nicky Hilton got cheeky at the Versace show Sunday.

The 31-year-old designer wore an avant garde white dress with large grommets and see-through panels to the label's Paris Haute Couture Week event. Hilton accidentally flashed her bare butt cheeks as she climbed the stairs, coining the term "underbutt."

Hilton watched such models as Kendall Jenner and Karlie Kloss walk the runway for Versace. She posed with the brand's artistic director, Donatella Versace, at a luncheon prior to the show, writing, "Love me some Donatella."

Hilton is not the only celebrity to experience a wardrobe malfunction at Paris Haute Couture Week. Actress Elizabeth Olsen inadvertently flashed her underwear in a Marilyn Monroe moment at the Miu Miu show Saturday.

Hilton is the great-granddaughter of Hilton hotels founder Conrad Hilton, and sister to perfume magnate Paris Hilton. The designer got engaged to James Rothschild in August 2014, and celebrated her bachelorette party with Paris Hilton and several friends in June.