Pop sensation Psy is struggling to behave himself since finding fame and becoming an unofficial ambassador for his native South Korea.

The rapper has gained fans around the world since releasing catchy hit Gangnam Style in July (12), setting a new Guinness World Record for the most 'liked' YouTube.com video ever and landing the Ok-gwan Order of Cultural Merit in his home country.

However, Psy admits his popularity has come with a price - he now has to act responsibly at all times as South Korea's most famous cultural export.

He tells BBC Newsbeat, "Before Gangnam Style, they liked me (in South Korea) but I was not that good behaviour artist, or good attitude artist. I can say I was bada**...

"They are saying I'm making history for the country right now, so all of a sudden I just became the guy who's representing one country. That's really heavy pressure. I don't want to live like that! I'm not that responsible person. I hate the word responsibility, I really hate it.

"I wasn't responsible at all before Gangnam Style. When I wrote the song Gangnam Style, I didn't think about it to be responsible. This is just (a) funny song. And now, I gotta be good."