All of Oz was celebrating. People dressed in every possible shade of green were dancing on the streets, children were playing and everywhere only one phrase was heard, gleefully shouted like a greeting. "The Wicked Witch of the West is dead!" - Written down version of the musical plot, some scenes/dialouges/etc. added
Galinda is eager to celebrate Lurlinemas with Elphaba and Fiyero and she wants it to be perfect. But as so often, things don't always go the way we plan them. Shiz-Era, slight Fiyeraba implied.