Blair is thrilled when her mother, Eleanor, chooses her to be the new face of her clothing line; Serena and Dan are reminded once again that they come from two very different worlds; Nate and Chuck indulge in a boys’ weekend.

As ‘Gossip Girl’ posts news of the annual Cotillion Ball to take place on the approaching weekend, Blair decides not to go with Nate. Serena decides not to go either, so her grandmother, CeCe, shows up to change her mind.

The seniors put on a production; Chuck enlists help from an unlikely source — his nemesis, Carter Baizen.

Devastated by a plot twist in her life, Blair turns her back on her predictable existence in favor of a wilder lifestyle.

Gossip Girl livens things up at graduation by sending out a shocking email blast during the ceremony.

Blair and Chuck adjust to their new status as a couple; Serena returns from Europe with many secrets and a complicated relationship with Carter.

Blair begins NYU, determined to keep her Queen Bee status, but Georgina has other ideas; Serena recruits Carter to get even with Chuck.

It’s Blair versus Chuck as they both set their sights on a particular item up for bid at Sotheby’s; Georgina takes an interest in Dan.

Lily and Rufus move up their wedding, Chuck discovers a secret about Carter; Dan and Vanessa are pulled into one of Georgina’s schemes.

Dan invites Olivia to meet Rufus and Lily, which leads to all sorts of problems for the new couple; Serena and Nate team up to help Carter Baizen.

Chuck offers to throw a wedding for Dorota who insists that she and Vanya have a traditional wedding.