Boo!

Happy Halloween! For a bit of background, the holiday originates from the pagen holiday Samhain, from the Celts in the United Kingdom and Ireland. The name Halloween actually comes from All-Hallow-Even, which really means that it's the night before All Hallow's Day, aka All Saint's Day. In Mexico, the next couple of days are called Día de los Muertos, or Day of the Dead. Lots of people know the day when free candy is given out.
So, to celebrate:

Devils

The Devil Never Sleeps - Iron & Wine
Sympathy for the Devil - Rolling Stones
Devil Went Down to Georgia - Charlie Daniels Band
Saint Augustine in Hell - Sting

Ghosts

The Ghost of You Lingers - Spoon
Ghost Story - Sting
Ghostbusters - Ray Parker Jr.
Is There A Ghost - Band of Horses

And the rest...

Skeleton Man Dance - Carbon Leaf
Highway to Hell - AC DC
Halloween - Dave Matthews Band

Hype - Buy