To the tune of "We Wish You a Merry Christmas"

We wish you a happy birthday, (3x)
And years full of joy.

Best wishes to you from friends dear and true,
Best wishes for your birthday, happy birthday to you.

We've all gathered here with presents and cheer
To wish you good fortune in this coming year.
        or
We've all gathered here to rattle your cage;
We'll scarf down your cake and make fun of your age.

We wish you a happy birthday, (3x)
Now dammit, cut the ca-a-ake!