Pop music sampling (from the 1980s) have also been utilized as methods for the creation and elaboration of pop music. By the early 1980s, the promotion of pop music had been greatly affected by the rise of music television channels like MTV, which "favoured those artists such as Michael Jackson and Madonna who had a strong visual appeal". The latter half of the 20th-century included a large-scale trend in American culture in which the boundaries between art and pop music were increasingly blurred. Between 1950 and 1970, there was a debate of pop versus art. Since then, certain music publications have embraced
World music music genres, such as world, rock and pop can be as ambiguous and confusing to industry moguls as it is to consumers. This is especially true in the context of world music, where branches of ethnically influenced pop trends are as genre-defined by consumer perception as they are by the music industry forums that govern the basis for categorical distinction. Academic scholars tend to agree that, in today's world of consumer music reviews and blogging, global music culture's public perception is what ultimately distils a prevailing basis for definition from genre ambiguity, regardless of how clearly a category has been