Tonight is a song by South Korean group TVXQ, featuring Jaejoong as one of its lead vocalists before his later work with JYJ. His high note became a standalone clip shared by fans who collect standout live and studio vocal moments from K-pop idols. Passed around on soundboards and in fan edits, it separated from the full track because the peak works instantly without context. It remains popular with TVXQ and JYJ listeners as a compact example of Jaejoong's upper range and control.