mnli premise: Call me old-fashioned for caring, but increased popular music sales typically lead to increased classical or jazz music sales, due mainly to the effect of people feeling compelled to enter a music store and look around to see what's new since they were there to buy Thriller , or the Titanic soundtrack, or whatever got them in the door the last time. hypothesis: Titanic's soundtrack is the most sold song in the world with over 1 billion sales.