British pop music is popular music, produced commercially in the United Kingdom. It emerged in the mid-to late 1950s as a softer alternative to American rock 'n' roll. Like American pop music it has a focus on commercial recording, often orientated towards a youth market, as well as that of the Singles Chart usually through the medium of relatively short and simple love songs. While these basic elements of the genre have remained fairly constant, pop music has absorbed influences from most other forms of popular music, particularly borrowing from the development of rock music, and utilising key technological innovations to produce new variations on existing themes. From the British Invasion in the 1960s, led by The Beatles, British pop music has alternated between acts and genres with national appeal and those with international success that have had a considerable impact on the development of the wider genre and on popular music in general