She is one of the fashion industry's most in-demand supermodels. And Karlie Kloss looked radiant as ever as she attended a Perrier-Jouët lunch at Casa Tua in Miami to celebrate their collaboration with designer Garance Vallée. Stunning: Karlie Kloss looked radiant as ever as she attended a Perrier-Jouët lunch at Casa Tua in Miami to celebrate their collaboration with designer …