K3 is a Flemish/Dutch girl band with a Dutch repertoire, mainly aimed at pre-adolescent children. The name of the group is derived from the names of the three original members: Karen Damen, Kristel Verbeke and Kathleen Aerts. Kathleen Aerts left the group in 2009. Josje Huisman was chosen as K3's new member on October 3, 2009. Their music is produced by production company Studio 100 and is written by Miguel Wiels, Alain Vande Putte and Peter Gillis. K3 was founded by Niels William.

The band became famous without any airplay from the regular music television channels like MTV, instead marketing directly to children via children- and cartoon-channels.