By Caitlin Donovan
Updated Feb 18, 2011 @ 4:56 pm
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Credit: Courtesy of The CW

On Monday's episode of Gossip Girl, we celebrate Eric's 18th birthday, and things can never go off without a hitch, of course. Serena finds herself forced to chose between Ben and her family, while Blair discovers that her magazine job is not as glamorous as she once thought. Here, Blair is dressed in an Alice + Olivia blazer and a Milly dress. Tune in Monday 9/8c to catch your weekly dose of Upper East Side drama, and click through the gallery to see the rest of this week's wardrobe.