After struggling for the past several years to turn their stable of classic monsters into a cinematic universe, Universal seems to be leaning hard into the “let's try anything” approach and has just greenlit a musical based on the hit novelty song "Monster Mash". Bobby “Boris” Pickett’s song about a bunch of ghouls ripping it up on the dance floor hit #1 on the Billboard charts in 1962, despite the notable handicap of being one of the most irritating pieces of music ever written. But there’s an undeniable charm to its harmless goofiness, which has guaranteed it …