Watch Gossip Girl Season 4 Episode 19 online via TV Fanatic with over 6 options to watch the Gossip Girl S4E19 full episode. Affiliates with free and paid streaming include iTunes, Vudu, Netflix, YouTube Purchase, Google Play, and Verizon On Demand.
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Serena enlists Charlie to go undercover Gossip Girl-style to determine why Dan and Blair are spending so much time together. Chuck makes a devastating discovery of his own.