زياد الرحباني
He took piano lessons from a young age, and music courses at Berklee College of Music in 1990 and 1995. His music shows influences from his brother Marwan Rahbani and cousin Ziad Rahbani; classical music; and jazz music. Oussama's background in classical music developed alongside Marwan, and Ghadi Rahbani. He is also an avid music collector.