Photo PollWho's the Top Trendsetter?

Check out style mavens including Jessica, Beyoncé and Nicole and vote on who you think is the biggest trendsetter – then take PEOPLE's ultimate trends poll. By Serena Kappes

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SIENNA MILLER: BOHEMIAN

"She was instrumental in popularizing the boho look that we're seeing now – the cowboy boots with the peasant skirt, the low-slung belt over a tunic, the newsboy cap mixed with a pirate shirt," says Kaufman of Sienna Miller (in New York City). She's such a trendsetter, the British actress (and Jude Law's fiancée) even has a tote named after her – the Sienna bag by Kooba.

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