<Li> pop music automation </Li> <Tr> <Td_colspan="2"> 2017 in pop music </Td> </Tr> <P> Pop music is a genre of popular music that originated in its modern form in the United States and United Kingdom during the mid-1950s . The terms "popular music" and "pop music" are often used interchangeably, although the former describes all music that is popular and includes many styles . "Pop" and "rock" were roughly synonymous terms until the late 1960s, when they became increasingly differentiated from each other . </P> <P> Although pop music is seen as just the singles charts, it is not the sum of all chart music . Pop music is eclectic, and often borrows elements from other styles such as urban, dance, rock, Latin, and country; nonetheless, there are core elements that define pop music . Identifying factors include generally short to medium - length songs written in a basic format (often the verse - chorus structure), as well as common use of repeated choruses, melodic tunes, and hooks . </P>

When did pop music started in what year