In 2004, Ayach released Ya msahar eyni, produced by Jean-Marie Riachi, which was their second collaboration and become his most successful album, topping music and video charts for months with the singles Ya msahar eyni and Khallini Maak.
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Habbaytak ana, Ayach's eighth album, was released in December 2006.
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Ayach completed the album Albi Mal, which contained eight tracks comprising one continuous song, Albi Mal, written by Nabil Abu Abdo, composed and arranged by Jean-Marie Riachi, and the singles Alla Ykoun Ma'ak, Behwak, composed by Ramy Ayach and a cover of Allaylo Ya Layla, originally recorded by the Lebanese musician Wadih El Safi.
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In 1999, Ayach signed with Rotana and released his third album, Wel'ah, with the single Shta'tilak, written and composed by himself, arranged by Ehsan El Monzir, which occupied the top position on Billboard's National Sales in the National Airplay and International Arabic Airplay category.