常見問題：
問：1. Q: What is Secret? 答： A: Secret is a South Korean girl group formed by TS Entertainment in 2009.
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：參與冰桶挑戰的名人有哪些？ 答：參與冰桶挑戰的名人包括比爾·蓋茨、馬克·祖克伯、賈斯汀·比伯、泰勒·斯威夫特等。