Watch Gossip Girl Season 3 Episode 16- The Empire Strikes Jack. Gossip Girl decides to send a shocking email blast in the graduation ceremony of Constance Billard and St. Jude’s, pushing Serena to device a devious plan of attack. The Mean Girls Club challenge Jenny to succeed Blair as Queen Bee for next year. Lily and Rufus struggle with their relationship after Lily’s betrayal. As for the cliffhangers, Blair and Chuck finally…and Serena is shocked by…and Georgina decides to…and Dan, Nate and Vanessa unknowingly.