Most Fashionable Couples

See Tom & Katie, Nick & Jessica, and 10 other stylish celeb duos, as selected by PEOPLE style expert Danielle Dubin. By Serena Kappes

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GWEN STEFANI & GAVIN ROSSDALE

Stefani "knows clothing and loves it," says Dubin. "Even her casual looks are well put-together. She loves to experiment." While the singer (and designer of her own clothing line, L.A.M.B.) "does the high-fashion talking," her rocker husband (left, in Studio City, Calif.; right, in West Hollywood) has "more of a casual, laid-back look. He's a well-suited backdrop to her fashion risks."