Meet Me in St. Louis - "You and I"
http://www.youtube.com/watch?v=J9bhguJ3gwM

This is one of the more famous scenes from Meet Me in St Louis (1944). The father of a 1904 St. Louis family has just finalized plans to uproot them all to New York City. Everyone is shocked by the news. After everyone has excused themselves from the table and leaves the room, only Mr. and Mrs. Smith are left. Having incurred the wrath of the entire family, he looks over at his wife, and reproves her for ingratitude: "Aren't you afraid to stay here alone with a criminal? That's what I'm being treated like." In the parlor, Mrs. Smith sympathetically stands by her husband and accepts his decision. In a touching and moving scene expressing their family unity, inseparability and loyalty, she joins him in singing "You and I". As they sing, all of the family members slowly re-enter the room, taking their pieces of cake and sitting down quietly -- a sign that they too have accepted and understand the decision, regardless of their reluctance.