Thanks to its enormous popularity,�SECRET's Ji Eun has extended promotions for her solo debut single,�"Going Crazy". After SECRET wrapped up their promotions for "Shy Boy", member Song Ji Eun returned to the music scene to release her first solo work. The song quickly achieved immense popularity, and was ranked #1 in real time for both music and mobile ringtone charts. TS Entertainment revealed, "This year, we wanted to promote her solo single for only a short period of time. However, because the response has been far better than what we had expected, we've decided to extend her promotions until the end of March." Ji Eun will return to SECRET after she concludes her solo promotions in order to work on the group's new album. Meanwhile, rapper Bang Yong Guk will resume training for his�official debut with a new male idol group, the date for which has yet to be determined. Source: Newsen via Nate