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?

A new teacher in class always takes some getting used to, but Miss Pots beats it all. Kaya and Simon can't get along with her so they decide not to rest until they have gotten rid of Pots...