NewJeans‘ Hanni stunned netizens with a backless outfit for Fashion Week. NewJeans’ Hanni | @newjeans_official/Instagram On September 20, Hanni attended the Gucci fashion show for Milan Fashion Week as the global brand ambassador. Ahead of the show, Hanni teased her outfit on Instagram. | @newjeans_official/Instagram | @newjeans_official/Instagram As Hanni made her way to the car and media…