You have to watch this movie -like the poster said- it's a treasure! The songs, dances and the 50's costumes are really great. This movie was claimed as one of the best musical ever made. According to Wikipedia this movie has been parodied and imitated numerous times. Especially the dance, many great actors dance like Don Lockwood (Gene Kelly) in their films. Starting from Tom Hanks in Punchline, Jean Reno in Leon , Ewan McGregor in Moulin Rouge to a ridiculous janitor at Springfield Primary School, Groundskeeper Willie who was singing with an umbrella (like Gene Kelly of course) while it was an acid rain on The Simpson's episode Brawl in The Family.