What is the fine-grained topic of the following text: From Ms Hepburn's elegant black shift to Lady Gaga's meat gown, The Dress relives the marvellous and unforgettable dresses of fashion: think Liz Hurley's safety-pin ensemble, Princess Di's never-ending wedding dress, or that unforgettable white halter sported by Marilyn in The Seven Year Itch. Only return the topic.
Iconic dresses in fashion history