The massively successful Disney movie Frozen refuses to Let it Go, and is now added as DLC to Little Big Planet 3. Sony confirms that the package includes costumes based on the movies main characters Elsa, Anna and Kristoff. They can be bought separately, or all at once to get it a little cheaper (which also gives you the bonus costume Olaf, based on the wacky snowman).
Disney and Sony has also added the free DLC Winter Creator Kit to make you own Frozen winter wonderlands for Little Big Planet 3.