When You're Smiling
Louis Prima
(also many other versions)

When You're Smiling,
When you're Smiling
The Whole World Smiles with you.
When you're laughing,
When you're Laughing
The Sun Comes shining through.

But When you're crying,
you Bring on the rain.
So stop your sighing,
Be Happy Again.

When You're Smiling,
When you're Smiling
The Whole World Smiles with you!