I got a new Reader's Digest Collection of music. Found this song, written in 1929.
Keep your sunny side up, up! Hide the side that gets blue. If you have nine sons in a row, Baseball teams make money, you know! Keep your funny side up, up! Let your laughter come through, do! Stand up on your legs; Be like two fried eggs; Keep your sunny side up!
Love it. Or as my sister would say...."lurve it!"