A little rhyme

Rodney Burke: Now, for the final number,
John’s got a card in his hand with a little rhyme on it.
What is it?
John: It’s from the form up a third at Hemel Hempstead.
Rodney: Oh!
John: It says, “Dear George, John, Ringo, Paul,
here’s hoping that you’ll please us all.
A beauty song and swinging voice,
we leave it up to you, the choice.
We think you’re fab and really cool,
so brighten up our lads at school.
” Dig this, for here’s Paul, whistling “
Clarabella