Serena and Dan, who look like they're reunited and feeling so good, decide they have to make nice with their friends before they can make their debut as a couple. To patch things up with Blair, S tries to help with Blair's new Barney's pop-up shop, offering a sneaky plan. She sends a picture to Gossip Girl to make Sage think S and Stephen are back on so that Sage will go to Blair for help. Sage sets up a meeting with the teenage heads of the high schools, who agree to come to Blair's event. But when Sage realizes she's been played and that her dad isn't with Serena, she redraws the plan, and the girls come to talk crap about Blair's line. Too bad they all end up loving it. It's not the only silver lining: Serena and Blair are also BFFs again.