Genre:

Hollywood Musical Film
Since the advent of sound, the Hollywood Musical is a genre that has gained great popularity in offering its audience entertainment and a sense of escapism reminiscent of Broadway, with its use of popular songs and the notion of spectacle.
The Hollywood Musical Film genre was at it's peak in the 1930's,1950's (‘Singin' in the Rain’ and ‘Calamity Jane’), there has also recently been a revival in the genre.
Genre hasn’t always been given critical acclaim. Musicals made during the classical period in Hollywood, were considered to be just entertainment. It was not until the 1970's that film critics challenged the view previously held concerning musicals. Began to consider ideas such as: gender representation,the stage and film making, the achievement of spectacle,
(These elements are now considered to be important conventions of the Hollywood musical as a genre) Theorist Rick Altman (The American Film Musical)