The heiress may have coined a new phrase: underbutt. She accidentally showed it off.
The adorable pair sing hits from their album Cheek to Cheek during their New Year's Eve performance at The Cosmopolitan of Las Vegas.
Paris Hilton's little sister has said yes!
Is Marion Cotillard a true fashion success, or do you hate the floral print on this dress?
Model Miranda Kerr looks hot in a red lace dress at the David Jones store in Sydney, Australia. Kerr is the ambassador for the Australian department store.
ET Flashback '02: Paris Hilton
Oscar winner Kate Winslet strikes a pose in a black gown with a beaded waistband at the Yo Dona International Awards 2001 on June 21, 2011 in Madrid, Spain.
Evan Rachel Wood showed off her new pixie cut to perfection in a Dolce & Gabbana vest and slacks with red suspenders and Jimmy Choo pumps at the "True Blood" season four premiere.
Celeb Sweat: Paris Hilton
Paris, Kim & Nicole Hit Up Britney's Femme Fatale show in Los Angeles
Nicky Hilton Addresses Weight Rumors
