The Gossip Girl Series Finale Is Tonight! Here's a Handy Guide to Catch You Up Before You Watch.

While in Los Angeles, Serena runs into "Charlie" a.k.a Ivy—and, still not knowing her true identity—invites her back to NYC.

Blair's pregnant, and it could be Chuck's or the Prince's.

Nate falls for cougar Diana Payne, who offers him a chance to work at her publishing company, The Spectator. Later, we find out she's Chuck's secret mom.

Vanessa finds a novel Dan wrote about all his friends and has it published—everyone gets mad.

Ivy's ex-boyfriend figures out her secret, blackmails her for money, and starts dating Serena. He eventually tells Serena the truth, but the family believes Ivy.

Dan's in love with Blair, but he wants to make her happy, so he arranges for Chuck and Blair to run away together. The car crashes, Blair loses the baby, and Chuck nearly dies. Blair stays with Louis.

For some reason I've forgotten, Serena and Dan have a fake relationship to protect Blair—but Serena actually falls in love with Dan. Again.

Blair's wedding arrives. A video of Blair confessing her love for Chuck leaks. The wedding continues, but at the reception Louis reveals he doesn't love her and their marriage is just a contract. Blair runs away with Dan.

Nate unknowingly meets the real Charlie Rhodes—a NYU student. Turns out she's the love child of Carol and Lily's ex-husband, William.

The whole family finds out Ivy is an impostor. CeCe dies, and leaves a huge chunk of money to Ivy even though she knew Ivy's true identity.

Blair divorces Louis and starts dating Dan.

Bart Bass is still alive! He FAKED his death! Lily annuls her marriage to Rufus because she's still technically married to Bart.

Serena seduces Dan, they have sex, and she videotaped it to get revenge on Blair. Dan rejects Serena.

Blair chooses Chuck over Dan.

Serena leaves town, Dan leaves for Rome, and Blair meets up with Chuck in Paris.

Season Six