On The Playground

Sing It Back
"Repeat Until Unconscious"
Girlscream 1 : Muddy Worm Licking
Spastic Fantastic
Girlscream 2 : Mutual Non-Gay Eyeball-Licking

Avoid
Singing parodies of cartoon songs, such as the He-Man parody; "He has the power, to pick up a flower, in only an hour, or two...."