from the opera "Lucia Di Lammermoor", featured in the movie The Fifth Element.
I'm sorry I missed this when you originally posted. Being a HUGE fan of Jackie Evancho I couldn't help but compare them but I was still impressed. I honestly didn't think it was possible to sing that song accurately without help. Even Inva Mula, the original singer from the 5th Element soundtrack, needed to be auto-tuned.
Her new video was really cute and hilarious but thankfully, very short.
I can just imagine Jackie making a video like that... actually, no I can't.