On this week's Gossip Girl, some characters put on some masks, while others (and their true intentions) are unmasked. We finally find out what's motivating Diana, while Serena meets a new love interest who happens to be Charlie's ex. Dan gets exposed when he's hiding out from his book tour, and Blair and Chuck both find that they can't stop thinking about each other after last week's big apology. Check out these and the other big OMG moments!
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