[人氣歌謠] Secret - I'm In Love

常見問題：

問：4. Q: What was Secret's debut song?
答： A: Secret's debut song was "I Want You Back," released in 2009.

問：9. Q: What is the reason behind Song Ji-eun's departure from Secret?
答： A: Song Ji-eun left Secret in 2014 to focus on her solo career and acting.

問：人氣歌謠的演唱者通常是誰？
答：人氣歌謠的演唱者通常是知名的歌手、樂團或音樂製作人。