In a very ill hour, prompted by I forget what online, I looked up the Flanders and Swann skit in which Michael Flanders sings the French horn solo part of Mozart's fourth concerto for horn. Ill Wind, it's called, which arial font renders as a Roman 3, and I am now hopelessly earwormed.

I once had a whim and I had to obey it
To buy a French horn in a secondhand shop
I polished it up and I started to play it
In spite of the neighbours who begged me to stop.

I can beg all I like but it won't stop.