Well, there's one that goes

Happy birthday, happy birthday
We love you
Happy birthday, and may all your
Dreams come true
When you blow out the candles
One light stays aglow
It's the love light in your eyes
Wheree'er you go

Don't know where it comes from. Somebody ought to be able to point you to a source for the tune. I know some more but I'm too tired (at 3AM here) to remember them. Good luck.

Aloha,
Mark