What made this adorable little girl stop dancing to her favorite song? Her mother's worst nightmare.

A sweet little girl makes her mom smile when she hears her favorite song.

But her mom sees something in the rearview and she shuts the music off abruptly.

"That's my favorite song!"

But her mom's heart is pounding.

He asks for her license and registration.

And she dreads how this will go when he asks her to step out of the car.

She tries to explain to her daughter why she has to go with the policeman.

She promises she will come back soon.

But she doesn’t really believe that.

The images above tell the story, but nothing hits home like seeing it in this video.