Met Gala saw plenty of shots at sustainability. Vintage frocks were rife. Yes, there was Kim Kardashian’s $5 million Marilyn Monroe dress, but also Emily Ratajkowski in a beaded Versace dress from SS92, Adut Akech rocking an emerald frock by Christian Lacroix for AW03, and Amber Valletta donning a gold lamé dress which was archive Azzaro.