"Hair all frizzy, don't have a tizzy, thin lizzy!"- makes you thin.
"My inner thoughts of right and wrong, Come out come out where you belong!"- brings your consience out, but you're supposed to stand in front of a mirror, then your reflection will become your conscience.
"Hot monsters in the city, running wild what a pity!"- releases monsters into your city.
"Leg'n'fita runamita!" or "Grow legs and go away"- gives something legs and makes it run away.
"Train in vain, go to Spain!"- sends a train to Spain.