Must admit this made me smile, it bought back a memory from Sunday.
I had the GS's and the youngest decided to cry from the moment we put him in the car.
I sang all the way home, a 15 minute trip, nearly at the top of my voice but I think I shocked him enough for him to stay quiet most of the time.
This has only happened once with my DD1 many years ago and after I had pulled over a couple of times decided the best policy was to keep going and just get there.
Someone once suggested to me that it might have been a slight case of carsickness. To this day she cannot look down when a passenger.

Its hard to concentrate with a crying child in the car but it's better than them fighting.