Andy Fossum/SplashNewsOnline.com


WHAT SHE WORE
A black lace Jason Wu dress with peep-toe sandals

WHERE
At the "An Unforgettable Evening" benefit for EIF's Women's Cancer Research Fund

WHY WE LOVE IT
Reese Witherspoon had a sophisticated take on the lingerie trend, choosing a dress that was fully lined in a lighter shade for a peek-a-boo effect. Follow her lead and try out the sexy look in a similarly crafted design.

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CELEBRITY: Reese Witherspoon

DESIGNER: Jason Wu

TREND: LBD

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Reese Witherspoon

Reese Witherspoon in Jason Wu

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