This is the episode where Raven accidentally accepts the invitation to be married by the prince. When she goes to the ball, and they put her on that "throne" they place a crown on her head. You can clearly see a piece of hair hanging out of the crown, and out of place. Then the very next shot they show, her hair is perfectly up just how it should be. IF you watch it, you can tell that they couldn't have just "fixed" it.