This was the voicemail my father left for my little sister on her birthday. He sang all of it.
Happy Birthday to you,
We wish you were here too,
But you're not so we're going... to eat all your cake anyway...in your absence...
Mmmm that cake is good, here have some of this slice, no it's OK, she's not coming.
He never forgets a birthday so if you'd like to receive a Steve Martin Original voicemail on your special day, I can arrange that.