Blueberry Citrus Cake

• 3 eggs
• 3 orange zest (freshly grated)
• 2 lemon zest (freshly grated)
• 1 boxed lemon cake mix
• 600 gr powdered sugar
• 240 ml whipping cream
• 120 ml orange juice
• 120 ml water
• 80 ml oil
• 55 gr butter softened