In the original script for the Disney movie Frozen, Queen Elsa is a villain, not a hero. It was after writing her signature song "Let It Go" that the producers realized that they needed to rework her character.
But they didn't have to change the story. As BloodBlitz Comedy demonstrates, Elsa is easily cast as the villain with a bit of digital editing. Now, when she sings "Let It Go," she's telling Anna something much more sinister.
-via Pleated Jeans