Consequently there was an interval during which Broadway and the cinema attempted to join forces, you could say: a hit Broadway musical would hope to be optioned by Hollywood promptly enough for the film to benefit from the publicity campaign drummed up for a massive "roadshow" style movie release, a limited release in which a big new movie would open in specific movie-houses on a scheduled itinerary of U.S. cities, like it was a concert tour, with merch for sale. For a while in the mid-20th century, the biggest cinematic sensations every year were likely to be adaptations of musicals.
Then there was a series of high-profile dud musical movies in the late 1960s and the fad died out. Very sad. But thanks to that method of publicizing the blockbuster movie-musical, signature showtunes like Trouble (right here in River City) had the opportunity to transcend their Broadway origins and become truly **memetic**.