Disney announced its plan to release a sequel to Frozen on Thursday, sending children and winter enthusiasts alike into a tailspin. Coincidentally, Disney is releasing a Frozen short, titled Frozen Fever , to play before Cinderella , which hits theaters on Friday. In conjunction, Disney dropped a new song from the short on iTunes . The song is written by husband-and-wife songwriting team Kristen Anderson-Lopez and Robert Lopez, the same team responsible for the smash hit “Let It Go.”