Hallo K3 is a Studio 100 comedy television series, created by Gert Verhuilst, that follows the experiences of pop trio and best friends K3, portrayed by Karen Damen, Kristel Verbeke and Josje Huisman try to live in their apartment and trying to find a balance between being a pop star and live a normal live which turns out to be not so easy. The series debuted on October 6, 2010 in the United States. This is the first Studio 100 Original Series to be shot and aired in high-definition from the beginning; it is shot on tape, but uses a "filmized" appearance.

K3 is special guest on a cruise ship. They have to perform on the ball, and expectations are high. But during the cruise a lot goes wrong. Especially because of all the sabotage from Elvin the Pearl Elf. Of course Hanne, Klaasje and Marthe will be singing many new songs.

When Karen, Kristel and Josje are turned into 'rascals', they need to prove that they can behave for 24 hours otherwise they are punished in the most funny ways.

A series of misunderstandings lands K3 in the wrong volunteer jobs!

Because of a misunderstanding, Plop turns into the new king. Klus, Kwebbel and Lui move to the palace, while Plop is trained to be a king. Plop is worried. What happened with the real heir to the throne?