After Prince Charming learns that a girl who fits the slipper has entered the castle, he heads towards the foyer with a beaming smile, which quickly fades to disappointment when he encounters Anastasia instead of Cinderella.
Jaq and Gus pretending to be Lady Tremaine and the Prince while explaining to Cinderella that Lady Tremaine brainwashed the Prince into thinking he danced with Anastasia. Seriously.
"One more time! At the ball, at the ball! We showed ol' Princey after all, that Cinderelly was the maiden at the Balll!"
Lady Tremaine and Drizella's reactions in The Stinger when they turn back from their frog transformations to find themselves in a house, wearing Cinderella-style clothes and holding brooms.
Lady Tremaine picks up the knack of intuitive magic VERY quickly—but her only knowledge of how the wand works comes from what Anastasia happened to see, which means that for the vast majority of the movie, while she works earth-shattering levels of dark magic with a level of spite and cruelty that would make Maleficent blush...she still has to trigger all her spells with "Bippity boppity boo".