Buttoned all the way up and finishing at a prissy calf length, Amanda Seyfried’s polka-dot Gucci resort dress at the London premiere of her new film Lovelace was overtly prim, while the sheer fabric and bold red lip was subtly foxy as hell. This season, it's all about mixing things up, so go for classically prudish shapes in peekaboo fabrics or vice versa. It's where your inner minx meets your inner OAP (but just less creepy than that sounds).