Korea divided into what side or Korea?

Korea is divided into North Korea and South Korea....South Korea is much more better than North Korea. North Korea doesn't let people in to their country easily but South Korea is like a normal country...Also South Korea has famous companies such as Samsung,LG,Hyundai....Also nowdays(like 2010,2011) the korean singers are becoming really popular around the world...There are singer comany names like SM,JYP,YG....And they had a SM concert recently in France and the tickets were sold in 15minutes and so the other people who coudn't buy the tickets did kind of like a demonstrate on the streets....Famous singer groups like {Girls Generations}, {Super Junior}, {T-ara}, {2ne1}, {4minute}, {Shinee}..etc...