Solo出輯的Secret成員全烋星2日公開首張Solo專輯的《TOP SECRET》概念照。
經紀公司TS娛樂2日上午通過官方SNS釋出兩張神秘預告照。在第一張照片中，全烋星化身春日美少女，散發清純氣息，而在第二張照片中，強烈的煙熏妝和黑色美甲顯得十分高傲性感。
全烋星將在12日攜首張個人專輯回歸歌壇。
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：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."