Matt Keeble/Splash News and Pictures
Sharon Clott Kanter
Dec 22, 2010 @ 2:46 pm

'Tis the week for shopping! Some of our favorite celebrities are out and about cramming in some last-minute holiday purchases, including Sienna Miller, who was spotted carrying bags from Heidi Klein and Zadig & Voltaire in London today. See more holiday shoppers, from Jennifer Garner to Rihanna to Reese Witherspoon, in the gallery.

MORE:Check out InStyle's Holiday Gift Guide!

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