Seen It A Million Times, Needs More Examples.

It's that skirt twirl that female characters do, usually Disney Princesses, when they wear a full skirt or are in a dress with a full skirt. Examples here◊ and here◊. Usually, it's done to emphasize either how lovely the item is and/or how much the wearer loves it. Sometimes it denotes the youthful, cheerful girliness of the character herself. Sometimes done with wedding and/or prom dresses.

Related to Everythings Better With Spinning. Compare with Cape Swish.

Examples:

Animated film

• Disney's Cinderella gets a magic dress. Twirl occurs almost instantly, during the line "have you ever seen such a beautiful dress?".