4. The Shop Around The Corner
Oscar-winner Jimmy Stewart and Oscar nominee Margaret Sullavan co-star in this treasured 1940 standby as feuding shop clerks who are falling in love via anonymous letters they exchange until they reveal themselves on Christmas Eve. Named as one of Time Magazine's All-Time 100 Movies and preserved by the Library of Congress's National Film Registry, the movie inspired several modern-day adaptions including 1949's Judy Garland film musical In the Good Old Summertime, 1938 Broadway musical She Loves Me, and Nora Ephron's rom-com hit You've Got Mail.