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Nicole Richie's charm necklace. Katie Holmes' boyfriend jeans. Check out 2008's must-have items that celebs couldn't get enough of – and how to get the looks for less! By Andrea DeSimone

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KEY TO MY HEART NECKLACE

Though Britney Spears is busy promoting her new album Circus, the pop star keeps her boys close to her heart wherever she goes with a "Key to My Heart" sterling silver and Swarovski crystal pendant necklace engraved with her sons' names. Get Britney's two-pendant Key to My Heart necklace, $74, at keytomyheart.net.

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