1. K3 (pronounced English: Kah-dree, Dutch: Ka-drie) is a Flemish/Dutch girl band with a Dutch repertoire, founded in 1998. 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.
Their signature is that the girls in the group all three mostly wear the same outfit. The band is known as one of Europe's longest running girl band.

On the 6th of november Hanne Verbruggen, Klaasje Meijer en Marthe De Pillecyn were chosen as the new K3 after Karen, Josje and Kristel decided to quit after 17 years.
On May 8 2016 Karen Damen and Kristel Verbeke gave their last show after 17 years and Josje Huisman after 6 Years at the Lotto Arena Antwerpen

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. Initially on the concerts the band mostly played their own songs, but later the repertoire also comprised Joe Satriani songs. Joe Satriani, a significant person in the bands life, continues to have enormous influence on the band.
Web page: http://www.k3music.hu/

3. K3 a/k/a K3 Sisters or the K3 Sisters Band is a 7 person pop & rock band out of Texas, USA led by preteens Kaylen, Kelsey & Kristen Kassab. The band has their own youtube channel and web page: www.k3sisters.com. K3 is signed to independent label Bruce Ray Productions (BRP). Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.