The "national anthem of Halloween" may be the most popular song of the costuming season, but Bobby "Boris" Pickett's deathless "Monster Mash" only got that way with a lot of help. Wondering how the Hollywood Argyles' "Alley Oop," Ronny and the Daytonas, and Leon Russell fit into the picture? Curious as to how it almost never saw the light of day? Wondering what Boris Karloff and Elvis thought of it? Look no further. Read all about the creation of this Halloween anthem here.