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：8. Q: Has Secret appeared on any variety shows? 答： A: Yes, Secret has appeared on various South Korean variety shows, such as "Invincible Youth," "Law of the Jungle," and "Hello Baby."
問：10. Q: Are Secret still active as a group? 答： A: Yes, Secret is still active as a group, with the remaining members continuing to release music and participate in various activities.