SEASON FINALE! 2x24 The Goodbye Gossip Girl

Gossip Girl decides to liven things up at the Constance Billard and St. Jude's graduation by sending out a shocking and damaging email blast in the midst of the commencement ceremony, stirring Serena to come up with a plan of attack. The Mean Girl challenge Jenny to throw her hat in the ring to succeed Blair as Queen Bee next year. Lily and Rufus struggle to repair their relationship. As for the cliffhangers, Blair and Chuck finally... and Serena is shocked by... and Georgina decides to... and Dan, Nate, and Vanessa unknowingly... and it all happens in the series' climactic season finale.