It's Beethoven's Moonlight Sonata First movement. I have that cd and it's there, no. 1 with her playing it. That was a REAL easy question. Alicia's, by the way, favorite composer is Chopin and her favorite classical piece is Chopin's Raindrop Prelude. But her music has reminders of 90's music, early-mid 90's to be more precise. I admit that her performances of classical music, ie fur elise, etc., are horrible I mean, they suck, BADLY but then again she was influenced by Stevie Wonder's and Biggy, etc. Well I don't know what else to say so here's the end of this post.<P>By the way do you regularly listen to classical music or pop. My guess is pop because you obviously know of Alicia and her cd but you don't know Beethoven's Moonlight? If you listen to classical you should know that, that's is such a famous piece, it's everywhere.