Sometimes when a K-pop song is released, it becomes a hit and instantly goes viral. However, some songs don’t see a spike in their popularity until some time passes after their release for various reasons. This phenomenon is known in Korean as 역주행 “Yeokjoohaeng” which literally means driving in reverse. In the music industry, this word is used when old songs gain popularity on the charts. Many songs that fit this description immediately come to mind, so here are six K-pop songs that entered the charts long after their release, subsequently going viral. 1. EXID – “Up & Down” The rise of “Up & Down” after its initial ratings has saved EXID’s career. Thanks to a Hani-focused fancam showing the song’s choreography, the group progressively climbed the music charts shortly afterwards and even won several music show awards five months after the song’s original release date.