Politics and ... b-boy?

38th Parallel. DMZ. and b-boy? When do politics and popular culture collide? Think about it in the American context. Look at Angela Jolie. Brad Pitt. Bono. Though they might have made the switch to actually being more ambassadors (especially in the case of Bono), Pitt and Jolie are still a part of the Hollywood industry. And though they are figures to raise awareness, politics plays a role.

And the reason why they got known for doing work in other countries is because they were already well-known. People who do great work in other countries are often nameless or faceless because they are not well-known. Not to say that what Jolie or Pitt or Bono did was not great work, I respect them for taking their celebrity status and doing something meaningful with it, but I am getting off topic.
Let's look at another example in American culture. Look at the Obama campaign. If you haven't seen it already, check out the clip below. Is that not a merge of politics and popular culture?

So what place does this have in popular culture and b-boy? If you look at the video, you can see b-boys dressed up as North Korean and South Korean soldiers. What are they trying to say in this video? Are they trying to say anything at all?

This isn't the only example in Kpop culture. There are Kpop stars who are cultural ambassadors, ambassadors of food, culture, airports, political things (there was a claim that a Kpop song was used for border propaganda). Obviously, even on a non-political level (some I mentioned) celebrities are used for things like CFs and company promotions. So is it surprising or unreasonable for politics to dive into this sector as well? And what happens, like in the b-boy video, where the popular culture adds elements of politics. Was it just a satire and a parody and that's it? No more further analysis necessary? What about when an idol group requests not to wear a certain article of clothing or a celebrity talks about a political issue and netizens react? There is a current variety show going on with a idol group T-ara where they work for a Korean government official (I don't know all the details because I've only seen one episode). What about outside of Korea? Korean celebrities are representatives of Korea? Or are they not? Like in Rain's case, is he a representative of "Asian-ness"? What about Kim Yuna? Does politics and popular culture converge?