Beeliner posted just the chorus up above, but here's the rest.

You can hear this at YouTube, sung by Frank Crumit or by Hugh Laurie as Bertie Wooster.


SUNNY DISPOSISH
Words by Ira Gershwin; music by Philip Charig. ©1926.

1. Any time the thunder starts to rumble down,
Don't let hope tumble down,
Or castles crumble down.
If the blues appear, just make the best of them.
Just make a jest of them.
Don't be possessed of them.
At the risk of sounding rather platitudinous,
Here's what I believe should be the attitude in us:

CHORUS: A sunny disposish' will always see you through
When up above skies are blah 'stead of being blue.
Mister Trouble makes our faces grow long,
But a smile will have him saying: "So long!"
It really doesn't pay to be a gloomy pill.
It's absolutely most ridic', positively sill'.
The rain may pitter-patter.
It really doesn't matter,
For life can delish'
With a sunny disposish'.

2. Must confess I like your way of viewing it.
No use in ruing it
When gloom is bluing it.
Taking your advice, the sad and weary'll
Have no material
To be funereal.
It's a thought that they should all be swallowing, my dear.
Look at me; already you've a following, my dear.