Since the beginning of his career, Elvis Presley has had an extensive cultural impact. According to Rolling Stone Magazine, "it was Elvis who made rock 'n' roll the international language of pop." Rolling Stone encyclopedia of Rock and Roll describes Presley as "an American music giant of the 20th century who single-handedly changed the course of music and culture in the mid-1950s." His recordings, dance moves, attitude and clothing came to be seen as embodiments of rock and roll. His music was heavily influenced by African-American blues, Christian gospel, and Southern country. In a list of the greatest English language singers, as compiled by Q Magazine, Presley was ranked first, and second in the list of greatest singers of 20th century by BBC Radio.