Gangnam Style pop song lands UK number one for South Korean Psy

Korean rapper-singer Psy performs in New York.

Pop rapper Psy became the first musician from South Korean to land a UK number one with his single Gangnam Style.

The pop song was catapulted to the top spot after its release four weeks ago.

The YouTube video of the single has been viewed 253 million times in two months.

It is the websites most "liked" video of all time.