This is probably the most epic song I have ever come out of Japan for a long time. This song's evolution started with just the music put together. Then, random members of the Nico Nico Douga community put their own voices to the song. It all culminated with the release of the rising popularity of Hatsune Miku. In short, this song is the project of various members of the Nico Nico Douga community that put together 14 amateur singers together with 1 computerized voice singing 33 of the most popular songs on Nico Nico (and the web, somewhat).

This list was put together in another YouTube of the song:

01. THE iDOLM@STER - EEJENTO yoru o ?
02. Suzumiya Harui no Yutsu - Hare Hare Yukai
03. IOSYS - Kanbu de tomatte sugu tokeru ?
04. COOL & CREATE - Help me, ERINNNNNN!!
05. MADLAX - Nowhere
06. Yugioh Scene
07. JAM Project - GONG
08. Super Mario RPG - VIP Teacher
09. Digimon - Butter-Fly
10. Buso Renkin - Makka na chikai
11. SERA - Airman ga taose nai
12. Prince of Tennis Live Action - Yuuki VS Iji
13. Bokurano - Aninsutooru
14. Air - Tori no shi
15. Higurashi no naku koro ni - You
16. IOSYS - Marisa wa taihen na mono o nusun de iki mashita
17. J - Omoide wa Okkusenman
18. Suzumiya Harui no Yutsu - God knows...
19. Lucky Star - Motteke ! Sailor Fuku
20. Figyu@Mate - Gachacha Gyu
21. Sousei no Aquarion - Sohiji no Aquarion
22. Suzumiya Harui no Yutsu - Futari mono ji pittan
23. Silver Forest - Suru Pettan
24. Super Mario World - Here we go !
25. Ave;new feat. - True my heart
26. Ave;new feat. - Kiss my lips
27. HALFBY - RODEOMACHINE
28. Dragon Quest - Overture March
29. Final Fantasy - Final Fantasy
30. Figyu@Mate - Gachagacha Gyu
31. Prince of Tennis Live Action - Aitsu koso ga Tennis no Ouji-sama
32. Gouketsuji Ichizoku - Let's go ! Inyou shi
33. Yamada Kosaku feat. Foo San - Sakura

EDIT - I have a link to a mp3 of the song, should you want to hear it over and over without the video.

http://www1.axfc.net/uploader/13/so/N_28716.zip.html
Password: Kumikyoku