Frozen Fever

It's Anna's birthday, the first the sisters have spent together in years, and Elsa has planned everything: a treasure hunt across the kingdom and a party in the castle courtyard. The problem is Elsa has a cold and insists she doesn't. Every sneeze spawns tiny snowmen that scatter around Arendelle. Kristoff, Sven and Olaf hold the party together while the sisters follow the trail. Elsa gets worse, nearly falls from the top of a tower, and Anna talks her into going to bed. In the end, Anna looks after her sister, the little snowmen move in with Marshmallow at the ice palace, and a giant snowball knocks Hans flat in the Southern Isles.

1. Behind the scenesIt opened before Cinderella

   The short hit theaters on March 13, 2015, in front of Kenneth Branagh's live-action Cinderella. It was the sisters' first return after the film.

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2. ReferenceHans gets the worst of it

   Every sneeze from Elsa spits out tiny snowmen. At the end, a giant snowball flies all the way to the Southern Isles and flattens Hans while he shovels horse manure.

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3. Behind the scenesSame team, new song

   Chris Buck and Jennifer Lee came back to direct, and the Lopezes wrote "Making Today a Perfect Day," the short's song.

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