Stars always save their best looks for fashion's biggest night: the Met Gala. With Amal Clooney, Rihanna, and Donatella Versace co-hosting alongside Vogue EIC Anna Wintour this year, you better believe celebrities brought their A game. Case in point? Rita Ora.  The singer walked the Met's iconic steps in a sheer black dress by Prada that made us do a double take. Rita's gorgeous gown featured a sequined skirt with a tulle train that looked like it went on for miles. She finished off her look with a matching headpiece and sequinned gloves. Read on for a closer look.      Related:                                                                                                           The Most Unforgettable Met Gala Moments