The Success Story of 'Super Mario Bros.' Music.

The Library of Congress recently added a new collection of hit songs to the National Recording Registry, including "All I Want For Christmas Is You" by Mariah Carey. One of the most recognizable tunes on the list was written by a relatively unknown songwriter whose work is familiar to billions of people. The article explores the mind behind the music that gets stuck in our heads and the impact of hit songs on pop culture.