Olivia says something she regrets during her appearance on Jimmy Fallons talk show and tries to keep Dan from finding out. With election day around the corner, Nate suspects his grandfather will stop at nothing to get Trip elected to congress. In the midst of another feud with Serena , Blair befriends a new it girl and takes her to an election night party at Chucks hotel, hoping to make Serena jealous. Taylor Momsen, Jessica Szohr, Kelly Rutherford and Matthew Settle also star.

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