This is the opera scene from the movie "The Fifth Element" in which Inva Mula (as Diva Plagalaguna in the story) was singing on stage with her beautiful beautiful voice.
According to YouTube: ".... This song is actually in 2 parts. The first 2/3 is from opera, Lucia di Lammermoor by Gaetano Donizetti. It's known as the "Mad Scene", and there are many versions of this complete scene here by many singers. The last part is called the "Diva Dance" and it's written specifically for this movie ....."
Source: YouTube http://www.youtube.com/watch?v=4MR6D7tL38U&feature=related