k-pop has come full circle here, in a manner of speaking, from last year's Lee Hyori
and Seo In Young
posts to the one Erik posted above.
On a related note Kyler England co-wrote a song, Tick Tock, released by U-Kiss (Korean kpop group) in Japanese
and Korean, and Allison Veltz (formerly NYC now Nashville singer-songwriter) co-wrote Mr. Taxi which was released by Girls' Generation in Japanese
and Korean. Girls' Generation also recently performed on Letterman.