The term 'Musical with a Titular Number' refers to the musical 'NINE', which is based on the 1982 semi-autobiographical film 'Eight and a Half' by Federico Fellini. The musical was first performed in 1982 and has been revived several times since then. It follows the story of Guido Contini, a famous Italian film director, as he struggles to find balance between his professional and personal lives. The musical features a number of popular songs, including 'Be Italian' and 'Unusual Way'.