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music" and "pop music" are often used interchangeably, although the former describes all music that is popular and includes many diverse styles. "Pop" and "rock" were roughly synonymous terms until the late 1960s, when they became quite separated from each other. Although much of the music that appears on record charts is seen as pop music, the genre is distinguished from chart music. Pop music often borrows elements from other styles such as urban, dance, rock, Latin, and country; nevertheless, there are many key elements that define pop music. Identifying factors usually include short to medium-length songs written in a basic format, also known as perrypoetry (often the verse-chorus structure), as well as common use of repeated choruses, melodic tunes and hooks." - (en.wikipedia.org 01.03.2020)