My mommy told me something a little girl should know
It's all about the devil and I've learned to hate him so
She says he causes trouble when you let him in the room
He will never ever leave you if your heart is filled with gloom

So let the sun shine in, face it with a grin
Smilers never lose and frowners never win
So let the sun shine in, face it with a grin
Open up your heart and let the sun shine in.

When you are unhappy the devil wears a grin
But oh, he starts a running when the light comes pouring in
I know he'll be unhappy cause I'll never wear a frown
Maybe if we keep on smiling he'll get tired of hanging around

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