急求!!用英语介绍美国流行音乐.

最好篇幅长些,我要讲30分钟的演讲.
谢谢啦~~~
急啊.

American popular music had a profound effect on music across the world. The country has seen the rise of popular styles that have had a significant influence on global culture, including ragtime, blues, jazz, rock, R&B, doo wop, gospel, soul, funk, heavy metal, punk, disco, house, techno, salsa, grunge and hip hop. In addition, the American music industry is quite diverse, supporting a number of regional styles like zydeco, klezmer and slack-key. The appeal of these styles lies in their supple, energetic rhythms, their appealing vocal lines, and in many cases their symbolic associations with the plight of the underprivileged.

Distinctive styles of American popular music emerged early in the 19th century, and in the 20th century the American music industry developed a series of new forms of music, using elements of blues and other genres of American folk music. These popular styles included country, R&B, jazz and rock. The 1960s and '70s saw a number of important changes in American popular music, including the development of a number of new styles, including heavy metal, punk, soul, and hip hop. Though these styles were not popular in the sense of mainstream, they were commercially recorded and are thus examples of popular music as opposed to folk or classical music.

American popular music has become extremely popular internationally. Rock, hip hop, jazz, country and other styles have fans across the globe. BBC Radio DJ Andy Kershaw, for example, has noted that country music is popular across virtually the entire world. Indeed, out of "all the contributions made by Americans to world culture... (American popular music) has been taken (most) to heart by the entire world". Other styles of American popular music have also had a formative effect internationally, including funk, the basis for West African Afrobeat, R&B, a major source for Jamaican reggae, and rock, which has profoundly influenced most every genre of popular music worldwide. Rock, country, jazz and hip hop have become an entrenched part of many countries, leading to local varieties like Australian country music, Tanzanian Bongo Flava and Russian rock.

Rock has had a formative influence on popular music, which had the effect of transforming "the very concept of what popular music" is while Charlie Gillett has argued that rock and roll "was the first popular genre to incorporate the relentless pulse and sheer volume of urban life into the music itself".

The social impacts of American popular music have been felt both within the United States and in foreign countries. Beginning as early as the extravaganzas of the late 19th century, American popular music has been criticized for being too sexually titillating and for encouraging violence, drug abuse and generally immoral behavior. Criticisms have been especially targeted at African American styles of music as they began attracting white, generally youthful audiences; blues, jazz, rock and hip hop all fall into this category.

because it is let me feel relax.