زياد الرحباني
Many of Fairuz's numerous unreleased works date back to the 1950s and 1960s and were composed by the Rahbani Brothers (certain unreleased songs, the oldest of all, are by Halim el Roumi). A Fairuz album composed by Egyptian musician Riad Al Sunbati (who has worked with Umm Kulthum) was produced in 1980 but is unlikely to be released. There are also fifteen unreleased songs composed by Philemon Wehbe and 24 unreleased songs composed by Ziad Rahbani in the 1980s.