You can't wear blue jeans in North Korea. They are considered to be a symbol of American imperialism. This also relates to piercing. The authorities think that the western fashion trends influence the citizens of North Korea badly.
Besides fashion, the government doesn't trust even food that came from abroad. North Korea and Cuba are the two countries in the whole world where you can't buy any Coke. The North Koreans have also never heard about pizza.
But remakes are their favorite things! North Koreans have their own version of "Twinkle, Twinkle Little Star". The music is the same, only, in this case, the song is called "We Have Nothing to Envy in the World".