Influential New Orleans songwriter, producer, arranger and pianist Allen Toussaint sits down with Simon and Brian to discuss his long career including the writing of classic songs like 'Mother in Law' (Ernie K-Doe), 'Whipped Cream' (Herb Alpert), 'Working in the Coal Mine' (Lee Dorsey), 'Here Come the Girls' (Ernie K-Doe), 'Southern Nights' (Glen Campbell), 'Happiness' (The Pointer Sisters) and more. Allen talks in depth about his creative process and also gives advice for young songwriters.