James Devaney/WireImage

WHAT SHE WORE Lively visited the N.Y.C. studios of the Late Show with David Letterman in a cutout sequin Elie Saab dress and Charlotte Olympia pumps.

CELEBRITY: Blake Lively

DESIGNER: Elie Saab

TREND: Cut-outs

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Blake Lively

Blake Lively in Elie Saab

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