Christmas is celebrated with the people you love. Right? In De Grote Hummimummi Kerstspecial Hummimummi wants to film a karaoke special, together with his best friend Oessiepoessie, but Oessiepoessie is lovesick and does not want to. They fight and each decide to make their own Christmas show. It ends in a battle, when both of them acquire the help of the best singer of The Netherlands. Will Hummimummi and Oessiepoessie unite before Christmas?