Fashion decoder: The bob haircut
As fall hemlines hit the floor, hair lengths are going up, up, up. Keira Knightley unveiled a sharp new bob recently at Paris Fashion Week but, true to her title, first lady Michelle Obama's been rocking the look for years
Gwyneth Paltrow: Golden girlMark Von Holden
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Elisabeth Moss: Retro glamJason Merritt/Getty Images
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Michelle Obama: First-rateJoyce N. Boghosian/The Associated Press
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Keira Knightley: Freshly shornPascal Le Segretain/Getty Images
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