The following list represents the most viral tracks on Spotify, based on the number of people who shared it divided by the number who listened to it, from Monday, Dec. 8 to Sunday, Dec. 14 via Facebook, Tumblr, Twitter and Spotify.
1. Sam Smith, "Have Yourself A Merry Little Christmas" (Capitol Records Ltd.)
2. Madeon, "You're On" (Sony Music Entertainment UK Limited)