Top 40 is a music industry shorthand for the currently most-popular songs in a particular genre. The term is derived from record music charts, a few of which traditionally consist of a total of 40 songs.
Pop music (a term that originally derives from an abbreviation of “popular”) is a genre of popular music, which originated in its modern form in the 1950s, deriving from rock and roll. The terms “popular music” and “pop music” are often used interchangeably, even though the former is a description of music which is popular (and can include any style).
As a genre, pop music is extremely eclectic, often borrowing elements from other styles including urban, dance, rock, Latin and country; nonetheless, there are core elements which define pop. Such include generally short to medium-length songs, written in a basic format (often the verse-chorus structure), as well as the common employment of repeated choruses, melodic tunes, and hooks.
So-called “pure pop” music, such as power pop, which has been described as mixture of hard rock and melodic pop music and tends to be more aggressive than pop rock, features all these elements, using electric guitars, drums and bass for instrumentation. The Top 40 became a survey of the popularity of 45 rpm singles and their airplay on the radio.
By the late 1980s and the early 1990s, the 45 rpm record would decrease in popularity and other means would be used to evaluate the popularity of new songs, such as cassette-single, CD single, and digital MP3/AAC sales (plus radio airplay). Some disc jockeys of Top 40 and similar format programs have been implicated in various payola scandals.
Genre Lables: Traditional pop, rock and roll, folk, classical, popular music, top 40, Singles
Notes: Guitars, dance, Singing, performance, Rock, Ballad, anthem, EDM