常見問題：
問：2. Q: How many members are there in Secret? 答： A: Secret originally had five members, but now consists of only four members after Song Ji-eun's departure.
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：冰桶挑戰在全球範圍內的影響如何？ 答：冰桶挑戰在全球範圍內引起了廣泛的關注和參與，成為了一個國際性的慈善活動。