In Frozen Fever, a short animated sequel to the hit movie, Queen Elsa of Arendelle organizes a party to celebrate whose birthday?
Frozen Fever:  It is a sequel to the 2013 feature film "Frozen", and tells the story of Anna's birthday party given by Elsa with the help of Kristoff, Sven, and Olaf. Elsa (Disney): Queen Elsa of Arendelle is a fictional character who appears in Walt Disney Animation Studios' 53rd animated film "Frozen".
Anna