See Reese Witherspoon's black-and-yellow yoga uniform, Gabrielle Union's geometric get-up and more celebs' fashion-forward, fitness-friendly outfits
Updated: Friday Dec 21, 2012 | 11:00 AM EST
By: Zoë Ruderman
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Downward-facing snood? Decked out in a seriously oversize infinity scarf, a colorful tank and black Skinnytees leggings, Hilary sneaks in a yoga class.
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