Image courtesy of : http://shelltoontv.deviantart.com/art/The-Artist-272214980?q=favby%3Acleverdisguise%2F38717858&qo=4

Acapella from http://mylittleremix.com/viewtopic.php?f=22&t=1039
Go and brohoof  http://www.youtube.com/user/DJXTrav for providing it

here's a download link : D http://www.megaupload.com/?d=6DJUDIP0
EXTRA DOWNLOAD LINK : http://www.2shared.com/audio/uRyxLCoj/Rarity_-_Everypony_should_know.html
NON VOCAL VERSION https://www.youtube.com/watch?v=47NB-8F5qXM