Watch Online Free on Watchseries. Hanne, Marthe, and Klaasje, the brand-new successors to K3, can't wait to see all their fans for the first time! That's why they're going on a grand tour of the Netherlands and Flanders together with Karen, Kristel, and Josje. The six of them will be throwing a K3 party twice as big as ever, featuring hits from their new CD 10,000 Balloons and the greatest old K3 hits!