Over the years, Hollywood's biggest names have showcased their winning red-carpet style at the annual Met Gala. While each year the bold style statements prove to be even more innovative and eye-catching, some looks stand out among the rest. Take Cher, for example. The "Believe" singer was a vision at the 1985 soirée, wearing a crystal-covered garment by iconic designer Bob Mackie. The look featured a sheer bodysuit and a low-rise skirt, which fit the "Costumes of Royal India" theme. A few years later, Princess Diana attended the party of the year in a timeless blue slip dress.