The story of Poovellam Kettuppar centers on the deep-seated rivalry between two legendary music directors, K.R. Bharathi (Vijayakumar) and C.R. Kannan
The term "" does not appear in the official song list for Poovellam Kettuppar . However, in digital music circles and fan communities (such as on Facebook ), users sometimes use unique tags or phonetics to describe specific BGM (Background Music) bits or "unreleased" music pieces that they have "updated" (upd) or extracted from the film.
While the soundtrack of is widely celebrated as the early masterpiece of Yuvan Shankar Raja , there appears to be a misunderstanding regarding a specific track titled " Hey Rathu " or an "upd" (updated) BGM by that name within this specific 1999 album.

