DESCRIPTION:
Dance of the Sugar Plum Fairy
from "The Nutcracker(1892)" P.I Tchaikovsky

Remix : millstones http://scriptedcity.aroundhalf.info/

Now this song is published on Bandcamp in some formats including FLAC lossless audio.
Of course you can download it free (limited 200 DLs per month), and it's under CC BY 3.0 license:
http://millstones.bandcamp.com/track/dance-of-the-sugar-plum-fairy-electrohouse-remix