CARRIE UNDERWOOD posted an awesome home video of her five-month-old son Jacob making it very clear which parent he wants to hear sing him a lullaby. I'll give you a hint that you don't need. It's not his daddy, Mike Fisher.
Carrie's filming and it starts with Jacob on a mattress in a pretty good mood . . . until Mike starts singing, and the kid cries immediately. But then Carrie starts singing and he stops.
Mike does it a second time, and the tears flow again . . . until Carrie starts singing, and the tears stop. Mike tries it a third time, same result.