Entre las canciones más destacadas de Kai Hansen como vocalista están: "Ride The Sky", "How Many Tears" ,"Starlight" y "Victim Of Fate" de Helloween; "Somewhere Out In Space", "Last Before The Storm", "Rebellion in Dreamland", "Insurrection", "Into The Storm" ,"Heart Of The Unicorn", "Heading For Tomorrow", "Land Of The Free", "Heal Me" y "Dethrone Tyranny" de Gamma Ray; "Valhalla" y "Lost in the Twilight Hall" de Blind Guardian.