Halloween has roots in the ancient Celtic holiday of Samhain, according to the History Channel. And today, it's big business. In fact, the National Retail Federation expects consumers to spend $8.8 billion (yeah, that's "billion" with a "b") on Halloween stuff, which is down just a bit from $9 billion last year.

Here's a quick look at some other Halloween-related info. So sit back and enjoy these scary stats and frightening facts.