The latest styling trick is straight from the set of Miami Vice—pushed up sleeves. Keira Knightley wore a Wren blazer for a recent TV appearance. "I love how she rolled the sleeves up to show the contrast stripe lining," says the line's designer Melissa Coker. "It really made it her own." Scrunching your sleeves can also bring new life to a classic piece. Says Coker, "It makes [a jacket] more casual and personalizes a look."

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