Lascia ch'io piangia (Let Me Weep) is an aria by Handel for his early opera Rinaldo, though he had used the same tune with different words a few times before. In this version, a female prisoner is weeping and sighing for freedom in front of her captor who has just gotten the hots for her. It has lately appeared in a number of films, including "Farinelli." Here is a version by the famous countertenor (falsettist) Philippe Jarossky. Have you ever felt like your were trapped in a prison?

Non piu andrai (You Will Go No More) from The Marriage of Figaro is one of Mozart's most famous tunes and many people who don't know the name of the piece will instantly recognize the melody. In this march tempo aria, Figaro is telling the teenage scamp Cherubino that there will be no more flirting with the ladies as he has been drafted into the army and will soon be in battle. In the film "Amadeus" Mozart makes this into a tune from Salieri's pitiful little march. Here is the Welsh baritone Bryn Terfel. Are you a military veteran?

Song to the Moon (Měsíčku na nebi hlubokém) from Dvořák's opera Rusalka was made famous by its use in the movie "Driving Miss Daisy." In this Czech language fairy tale opera, Rusalka is a water sprite, the daughter of a lake and a creature literally made out of water. She wishes to become a mortal to make a human man fall in love with her. Needless to say, this ends badly. Here is the late Czech soprano Lucia Popp. Have you seen "Driving Miss Daisy?"

Nessun Dorma (Nobody Sleeps) from Puccini's last opera Turandot has been used in many films, including the "Witches of Eastwick," and "Bend it Like Beckham" as well as adopted in many pop versions. In this opera, the Mongolian prince Calaf muses over the Chinese princess Turandot's order that no one in Beijing will sleep until someone can find out his name. If they fail, she will have the entire city executed. Here is the great Luciano Pavarotti. Do you suffer from insomnia?