A megamusical is an epic, dramatic show featuring recurring melodies in a sung-through score; huge, impressive sets; and grand ideas. These qualities are accompanied by intensive marketing campaigns, unprecedented international financial success, and a marked disjunction between critical reaction and audience reception. Audiences adore megamusicals; they flock to see them when they open, and return again and again, helping long-lived shows to become semi-permanent tourist attractions. Yet generally speaking, critics either dismiss megamusicals as superficial entertainment, or rail against...