 The caricatured celebrities are, in order of appearance: The  Crooner: Frank Sinatra (qv); "Shortenin Bread":  Nelson Eddy (qv); "September in the Rain": Al Jolson (qv);  "Lullaby of Broadway": Jimmy Durante (qv); "Blues in the Night":  Cab Calloway (qv); The Old Groaner: Bing Crosby (qv).