From 

(Note: The 'bee' in the 'bee happy' 
chorus is sung by a space bee 
and the 'happy' line is sung by the 
character mentioned in the transcript)


In every life, we have some trouble,


But when you worry, you make it double


Don't worry, bee happy!


The landlord says your rent is late


He may have to litigate


Don't worry, bee happy!


Ain't got no cash, ain't got no style
Ladies vomit when I smile
But does Zoidberg worry?
Feh! You wish. Bee happy!


Don't worry now Amy


OK, I'm happy!!


Take us home Bender!!
Don't worry!! Bee happy!!

                          Thanks to Shaun Bridges for these lyrics