With all of Canterlot ready to celebrate it's new princess, and former empress, getting her crown the celebration is in full swing. Everypony's been given a week off from school, and Celestia's got enough anti-changeling potion to down half of Equestria in her private alchemy lab for a toast to her daughter. Dresses have been made, nobles have been summoned, and all the important ponies of an amber alicorn's life are being gathered.
Now, all they need to do is get Sunset to take that deer in the headlights look out of her eyes long enough to walk down the aisle.