K3 Bengeltjes is the fourth movie with K3. It was directed by Bart Van Leemputten. It is the first movie with new member Josje Huisman.
The girls of K3 are excited because their cousins will come to visit them for the weekend. But their excitement is quickly dissipated, because their cousins are obnoxious. They break everything in their apartment. Karen calls them terrorists. Angel Manuel sends his assistant Tuur to take K3's cousins, but he accidentally takes K3 instead and makes them into "rascal angels". K3 must be well behaved for 24 hours, but that is not as easy as you think.
The title song of the movie Waar zijn die Engeltjes (En.: "Where Are the Angels") came out in July 2012.