There are at least 3 groups named K3: 1. K3 is a Belgian Band, consisting of Karen Kristel and Josje. The band was formed in 1998 with Karen, Kristel and Kathleen with their debut single 'Wat Ik Wil.'
2. Hungarian instrumental progressive metal group. Their latest album "Under A Spell" has come out in 2007 and features Jordan Rudess (Dream Theater). Janos Kallai founded his own band in 1995. Since the very beginning the intention was to play instrumental rock music in a trio.