In Reading, Massachusetts, a four-year-old girl named Kaelyn Kerr got stuck in an elevator, along with her mom and her baby brother.  Firefighters came, and the only way to get them out was to go up a ladder (through the elevator shaft) and over a wall.  Needless to say, Kaelyn was scared and wouldn't move.  

In order to calm her down, firefighters sand "Let It Go" from Frozen...and it worked.  Here's the news story that may make you tear up.