Songs

• cry and smile
• egao
• Grotesque (グロテスク)
• OST Boku no hatsukoi wo kimi ni sasagu
• 瞳をとじて

Ken Hirai

Other Musicians

• Luis Miguel
• Kenan Doğulu
• Sabah
• Dove Cameron
• Haluk Levent
• Emmelie de Forest
• Reinhard Mey
• Giannis Vardis
• Samaris
• Shahram Nazeri