The Wit of a Poor Man

The Wit of a Poor Man

Q: A poor man is sitting in a pub. He sees that the man next to him is extremely rich.
Poor man: I have an amazing talent; I know almost every song that has ever existed.
The rich man laughs.
Poor man: I am willing to bet you all the money you have in your wallet that I can sing a popular song that includes a lady's name of your choosing.
The rich man laughs again.
Rich man: OK, how about my daughter's name, Joanna Armstrong-Miller?
The poor man goes home rich.
What song did he sing?

A: "Happy Birthday" This song can be sang with anybody's name in it.