Do you have a " party piece"?

I've just heard a song on the radio which reminded me of a friend of my parents, as he sang it ( beautifully) at family gatherings ( Macushla).
My father's song was " When I Leave the World Behind", and my mother's was " O Mio Babbino Caro".
I have been known to murder " Summertime" and " I Want to be a Prima Donna".