can you please recommend some beautiful piano music to me?

Chopin, Debussy, Ravel, Liszt (particularly "Un Sospiro"), Beethoven's sonatas, Rachmaninoff, are all among my favorite composers of piano music.

There are a ton of great pianists out there. Van Cliburn, Glenn Gould, Vladimir Horowitz, Maurizio Pollini, Sergei Rachmaninoff, Jeno Jando, Lang Lang, and many others both alive and dead.

If you like jazz I highly recommend Bill Evans, Keith Jarrett, McCoy Tyner, Brad Mehldau

I recommend you the following two amazing piano albums :-

1.Braziliana , Pianist : Arnaldo Cohen.

2.Franz Liszt - Opera Transcriptions, Pianist : Jean Yves-Thibaudet.

Try Erik Satie's Gymnopedies (and his other music as well) and Ravel's Pavanne Pour Un Enfant Defunte. Also have a listen to some works by Debussy, and the 2nd (slow) movement of Ravel's and Shostakovich's piano concertos; here's the link to Shostakovich's http://www.youtube.com/watch?v=twy4gaJeLqs

"Anything by Chopin" (thought I'd beat the lazy listeners to it).

Piano music does not count as a 'song'. Songs are sung by singers and have words. No voice, not a 'song'. Better to refer to 'pieces', 'works' or 'compositions' (or simply as 'music' as you did in the first part of your question).

anything Chopin, Beethoven, Mozart, Debussy

If you want beautiful piano & orchestra music, I suggest listening to the second movements of piano concertos. Most are quite beautiful and relaxing.

http://www.youtube.com/watch?v=aifBfv44jzk

http://www.youtube.com/watch?v=df-eLzao63I

http://www.youtube.com/watch?v=jWRb90BRB5w

http://www.youtube.com/watch?v=NPQKINSB2W0

The list is almost endless.

Anything by Chopin

It's a cover and it isn't classical, but it has nothing but piano and voice, and it's beautiful. Mad World by Gary Jules.