Also:

Happy Birthday tooooo yoooouuuuuuuuuu.

Happy Birthday tooooo yoooouuuuuuuuuu.

Happy Birthday soarrrrtstaaarrrrrrrrrrr....

Happy Birthday...

Happy Happy Birthday...

Happy Wild and Crazy Birthday...

tooooooooooooooooooo yooooooooooooouuuuuuuuuuuuuuuu.