Besides good looking face, actually there are 5 reasons why Kpop become popular throughout the world:
1. Long struggle
In Korea, music with dance began to be known when the hip hop group Seo Taiji & Boys started their debut in 1992. Now, one of its personnel, Yang Hyun Suk has one giant agency, YG Entertainment artists that overshadow the Big Bang and 2NE1 which are currently have worldwide tour. Thus, the K-Pop fever is not instant things. There is a struggle for many years and experienced peoplebehind all of the popularity.
2. Hard Work
They do training for years without knowing when they start their debut on the musical stage. Training usually done every day include singing lessons, dance, language, behavior, and so on. SNSD members started their training since they were in elementary school, Jo Kwon '2 AM ' started his training when he was 12 years old and new debut 7 years later, and G-Dragon started his since he was 7 years old and debut at the age of 18 years old! With hard work mentality and not give up easily, it seems fair if now they are appreciated by their fans all over the world.
3. Fan Service
Fan service for Kpop idol is everything. They are willing to not have a girlfriend (or dating secretly) so that they will not make their fans heartbroken. In the variety show they always smile and look happy even though they just have very little time to sleep due to the hectic schedule. Sometimes if they have a gig in hot weather, they share their own drinks or ice cream to the fans who were lined up as Lee Hongki 'FT Island' did.
On stage they are usually open shirt showing off the body shape to make the audience hysterical. For Kpop idols, fans are everything.
4. Cooperation with the Famous Name or Brand
Kpop idols usually work with big names in the world such as using the choreographer who handled Michael Jackson or Beyonce Knowles, collaboration with international designers, or shooting a video clip in America with American models. Because they have many fans, they usually endorsed by the major labels. We can easily find 2NE1 in a well-known sports brand advertising or Super Junior in cell phones and smart television advertising. They are everywhere!
5. Government Support
This is the most important one. The Korean government strongly supports the entertainment field as part of carrying the name of Korea to the international world. The idol was being a variety of ambassadors, such as KARA as Korean food ambassadors. Also Psy who recently was made a free concert by the Seoul city government. The city government also provide additional transportation to accommodate 80 thousand spectators who attend the concert.