As soon as sound was introduced to the movies, the movie musical was born. The musical was one of the most popular movie entertainments from the 1930s through to the 50s, before falling out of favour at the end of the 60s for audiences now being weened on Vietnam, race riots, political assassinations, flower power and psychedelia. The musical still continued onwards, albeit in a different form, with various efforts such as "Cabaret", "The Rocky Horror Picture Show", "Grease", "Hair", "All That Jazz" and "The Blues Brothers" appearing over the next decade. More recently, "Moulin Rouge" and particularly "Chicago" hark back to the glory days of the musical. Right: Liza Minnelli does "Cabaret"