A mother was on her way to a hair salon with her 4-year-old daughter and infant son when their elevator became stuck between floors. 

When firefighters arrived and put a ladder in place to rescue the family, the little girl got nervous, which is exactly when the first responders tried something unusual: singing 'Let it Go' from Frozen.

Turns out, it worked. The little girl calmed down and they were able to safely remove the family from the elevator.

Check out the story from Fox Boston:

 

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