Before Monday night's season finale, get an inside look at the Upper East Side's most anticipated wedding. By
Credit: Giovanni Rufino/THE CW
Updated: Friday May 16, 2008 | 05:45 PM EDT
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Leighton Meester and Blake Lively (as Blair Waldorf and Serena van der Woodsen, respectively) trade their plaid uniforms for bright floral dresses to attend the Upper East Side's wedding of the year: the Bass-van der Woodsen nuptials.
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