The clever butler needed some extra cash, so he tells his master:
"I know almost every song that has ever been written"

The master laughs at this, but the butler says
"I am willing to bet you a months pay that I can sing a song that you have heard of with the lady's name of your choice in it."

"Deal", says the master. "How about my mother's name, Felicity Jane Ashley?"

And so the bulter sang and earned himself an extra months pay.

What song did he sing?