This one is easy for me. My mom had to talk me into watching it because it is a musical and I was in high school and thought musicals were lame. But then I watched "An American in Paris" and I had to tell mom that she was right. Set in post-WWII Europe, Jerry Mulligan (Gene Kelly) is a ex-GI painter who decided to stay in Paris. He quickly falls for Lise (Lesli Caron), who happens to be engaged to cabaret singer Henri Baurel (George Geutary), who happens to be friends with Jerry's friend Adam (Oscar LeVant). Along the way, Jerry is discovered by Milo Roberts (Nina Foch), who is interested in Jerry for more than his art. When I took my good friend to the Ohio Theater to see it on the big screen, she and the audience were stunned by the overt sexual innuendo in a movie written during the "puritan" 1950s. The dancing is spectacular, and by the end you feel that Jerry and Lise simply MUST be together or the entire world will end. Oh, and all of the music is by Gershwin. Good, good, superb stuff.
When I watched this scene as a teen, I used to yearn for someone to love me the way they obviously loved each other. It's still my favorite scene. You can watch it here.
What is your favorite movie?