Poor Little Bug on the Wall
(source: "The Worm Song and Other Tasty Tunes, Janet Wilson, 1993.)

Poor little bug on the wall
No one to love him at all
No one to wash his clothes, no one to tickle his toes
Poor little bug on the wall!

Repeat the song a number of times using different actions. For example:

Loud: sing really loud
Sad: sing really sadly
Underwater: sing with one finger drumming against lips
Opera: sing in an opera voice, hands clasped in front of body
etc.