I promise you, this is a totally serious pick. The title may sound like a joke, but if you're not familiar with Abbott and Costello, or have heard of them but never actually seen anything they were in, trust me, go ahead and start here, because it's one of their very best. The duo accidentally run into a cavalcade of Universal's classic horror monsters, in this one Frankenstein, Dracula and The Wolf Man (with the original Dracula himself, Bela Lugosi reprising the role) and hijinks ensue, but it's still hilarious. It completely holds up and is just as funny today, plus it's perfect for Halloween!
Original 1948 Trailer: