Ever since the earlier days of K-Pop, many of the big agencies would often times enlist songwriters overseas to help write a hit song for their idol groups. SM Entertainment have done it on several occasions as the agency is known to work closely with well-known songwriters and producers based in Sweden, the home of pop hit makers.
JYP Entertainment have worked a few times with overseas writers for their girl group TWICE as well.
In fact, if you look at the credits, you may have noticed a song writer by the name of David Amber appears on several K-Pop idol groups' song credits.
South Korean netizens have been talking about the impressive list of the songs that he has written for K-Pop idol groups, including his most recent one for TWICE, 'Yes Or Yes'.
In addition, the songwriter has quite an impressive list of other songs he wrote for other popular K-Pop groups.