Previously on Gossip Girl, Serena van der Woodsen (Blake Lively) suddenly came home from boarding school, Dan Humphrey (Penn Badgley) asked Serena out, Blair Waldorf (Leighton Meester) and Serena fought and then made up, Jenny Humphrey (Taylor Momsen) aspired to climb social ladders, Dan confided in Blair about his mother Allison, Rufus Humphrey (Matthew Settle) sold Lily van der Woodsen (Kelly Rutherford) one of Allisons paintings.Tonight, on Gossip Girl, its all about Blairs annual sleepover. A tradition since 2000, each sleepover, or soirée as Blair likes to call them, is more decadent than the rest. Its kind of like a girl version of Chuck Basss (
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