The crossword solution for the term 'Rigoletto Highlight' is 'ARIA'. An ARIA is a self-contained piece for one voice, with or without instrumental accompaniment, normally part of a larger work such as an opera, cantata, oratorio, or musical. Rigoletto is an opera in three acts by Giuseppe Verdi. It is based on the play Le roi s'amuse by Victor Hugo. The highlight of the opera is the ARIA 'La donna è mobile', which is sung by the Duke of Mantua.