Mumps

Your Majesty Is Like A Cream Doughnut (Quiet):

La

La

La

I have minded my Ps and Qs
Tried not to damage any Ws
And if I tread upon a B
I pick it up and tell it earnestly
I'm sorry
Which of course I am
Mustn't upset
Or badly neglect them
Or else they'll refuse to work for U

I have minded my Vs and Us
Tried to prevent them being badly used
And if I tread upon the C
I tend to sink beneath the surface gracefully

As for the task of keeping Os and Ks apart
You'd be right to suppose that it is quite an R
I've trod with caution round the Js and Zs
I remain a man of letters 'till the end

Balancing syllables upon my knee
I float through the air with the greatest of Bs
I did what you told me to
Now I only have Is for U

Prenut/Your Majesty Is Like A Cream Doughnut (Loud):

La