常見問題：
問：6. Q: What is Secret's most popular song? 答： A: Secret's most popular song is "Poison," which was released in 2014 and became a huge hit in South Korea.
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：冰桶挑戰是什麼？ 答：冰桶挑戰是一種慈善活動，參與者將冰水倒在自己身上，然後提名其他人參與，目的是為了提高對「肌萎縮性側索硬化症」（ALS）的認識和籌款。