Rufus and Lily are celebrating their one-year anniversary (time flies, eh?), but they're not in the mood for a big celebration without Jenny. Determined to give his dad and stepmother the party they deserve, Dan decides to go rogue. His faux blast to Gossip Girl falls flat, but when he intercepts Chuck and Blair's peace treaty, he also gets wind of a hilarious video of Blair singing karaoke in Stockholm. He arranges for a showing of the footage at Blair's bash, much to the chagrin of the birthday girl. Unfortunately, the joke's on Lonely Boy when Rufus gives him the classic disappointed father look and accuses Dan of being no better than Chuck and Blair.