Katy Perry makes a surprise runway appearance at Vogue World: Paris, alongside Ciara, Sabrina Carpenter, Bad Bunny, Kendall Jenner and more, rocking a barely-there Noir Kei Ninomiya gown. The fashion event was held during Paris Fashion Week at the Place Vendome, and saw A-list stars, singers, athletes and models hit the runway in celebration of 100 years of French fashion and sports.