Most Beautiful!

[Mynameisnemo]

I don't know about "Popular" but I like "Cannon D major" by...uh...I can't remember.

Just to let you know Cannon D Major is by J Pachelbel.
and is a great song to play live on a keyboard and guitar backing you up.

[Scorpiоn]

Kind of a hard one, since I can confuse powerful music with beautiful music, but they are nonetheless different for me.  I have a few, but without a doubt, one song stands above the rest:

Sasha Lazard - Romance

As for some others, in no particular order:
2. Rammstein - Ohne Dich (Under Byen Remix)
3. The Ahn Trio - Lullabye
4. Russian Red Army Chorus - Song of the Volga Boatmen
5. Craig Armstrong - Hanging / Escape

Tho' number four needs occasional audio adjustment.