The original is by The Living Tombstone and specifically Andrew Gold, all the money (if any) earned goes to them, no worries!

Here's a download link to the song (mp4 format) for those interested! Keep in mind, this song is owned by The Living Tombstone, not me! Find out what counts as fair use here: https://support.google.com/youtube/answer/9783148?hl=en, other than that, enjoy the song!
http://www.mediafire.com/watch/d5ktcznzx2tnd85/Spooky_Scary_Skeletons_%5BRemix%5D_%5BExtended_Mix%5D.mp4

Once again, the song is copyrighted, don't use it in Your videos or live streams to avoid copyright issues.

Here is the original which was removed: https://www.youtube.com/watch?v=XTgFtxHhCQ0.