Hello wickedaphrodite.What a beautiful song.This is one of the songs that Alicia keys did that got me interested in her.Loving Classical music was hard to love, when all your friends was loving everything else.lol But i always love music.(Any kind),It didn't matter to me.As long as it was Beautiful. You should be able to find (Monlight Sonata) at (Amazon.com).Or some other music sites.I too love the opera version,and the instrumental version.It's just a beautiful Song.I hope this help you out.Peace,BeeStrong.