John Kander and Fred Ebb created a number of 20th-century show classics, including Cabaret and Kiss of the spider woman, but Chicago is perhaps their greatest and best-loved show of them all. Mama Moreton sings ‘When you’re good to Mama’ to indicate to the prison inmates how the world really works. She is deeply cynical, knows the ways of the world and controls the purse strings of the prison, but she also turns out to be compassionate – a mother figure to the other inmates. This song requires sassy singing and good communication skills; to convey the double meanings, use careful timing, facial expression and, for the more daring, staging too!