Six Weeks(1982)

A wealthy cosmetic tycoon and her 12-year-old daughter, who's dying from leukemia, strike up a sentimental friendship with a California politician. Since the girl has only six weeks or less to live, the trio fly to New York City where the daughter skates the ice rink at Rockefeller Center, assumes the lead in The Nutcracker ballet, and sightsees most of the city.