常見問題：
問：Q5: What was the first album released by "Fly to the Sky"? 答：A5: Their first album, titled "Day by Day," was released in 1999.
問：Q6: Have "Fly to the Sky" members participated in acting? 答：A6: Yes, both Hwanhee and Brian Joo have ventured into acting in addition to their music careers.
問：冰桶挑戰是什麼？ 答：冰桶挑戰是一種慈善活動，參與者將冰水倒在自己身上，然後提名其他人參與，目的是為了提高對「肌萎縮性側索硬化症」（ALS）的認識和籌款。