What is the most famous song of the 1920s? The 30s? 40s?

Famous song for the 1920s: Swanee -Al Jolson, 1930s: Happy Days Are Here Again -Ben Selvin or Benny Meroff, and 1940s: When You Wish Upon a Star -Glenn Miller.
Updated on Sunday, February 05 2012 at 09:03PM EST
Collection: happy days