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：4. Q: What was Secret's debut song? 答： A: Secret's debut song was "I Want You Back," released in 2009.
問：全孝盛有參與過什麼綜藝節目？ 答：全孝盛曾參與過《我獨自生活》、《我獨自生活》等綜藝節目。