This is from a collab I did with Agiledash.  It was a ton of fun working with him and I hope to do more in the future.  The instrumental is credited to agile.  I did all the fluttershy samples and a few things here and there.  I really love how it turned out.  If you are not already subscribed to Agile please check out his channel.  I love his music and you probably will too =).   http://www.youtube.com/user/TheAgileDash/videos?view=0

You can download the song free on Agiledash's album(check out the other songs too).

http://agiledash.bandcamp.com/album/hollows

Artwork done by the amazing Tsitra360.  Yes this is a very popular wallpaper.  In fact I have a poster of it as well.
http://tsitra360.deviantart.com/art/Nightly-Wonders-272642971