Previous to her master program, she also lived in Berlin for a year to study with the German mezzo-soprano Gundula Hintz and graduated from the Royal Conservatorium The Hague in Classical Singing in 2013. Her applauded solo graduation performance ARIA VAN EEN ANGSTHAAS was also shown at Opera Days Rotterdam, Zwerfklank Festival Amsterdam and in the theatre venue Compagnietheater Amsterdam.
Theatre reviewer Theaterkrant.nl assigned ARIA VAN EEN ANGSTHAAS with 4 out of 5 stars, stating that “it seems like private matters but Den Hollander manages to give them universal meaning through both strong use of her emotionality while maintaining her sense of humor (…) Also it should not be neglected that, next to her theatre performance, her appearance as singer generates nothing but highlights (…) Her version of Brel’s ‘La Chanson des Vieux Amants’ is unprecedented and touching.” (Kester Freriks, Theaterkrant.nl)
She has been on pop stages both in the Netherlands and abroad while touring with THE KYTEMAN ORCHESTRA, such as Berlin, Frankfurt, Munich and Moscow. Other musical performances Oukje realized with the music trio MANNEKIJN, consisting of the pianist Vera Marijt, the violinist Camilla van der Kooij and Oukje herself. Oukje will be seen next in the show SHAFFY CHANTANT in Felix Meritis, Amsterdam.