Ziad Rahbani
In 1978, the trio toured Europe and the Gulf nations, including a concert at the Paris Olympia. As a result of this busy schedule, Assi's medical and mental health began to deteriorate. Fairuz and the brothers agreed to end their professional and personal relationship in 1979. Fairuz began to work with a production team helmed by her son, Ziad Rahbani, whilst Assi and Mansour composed for other artists such as Ronza.