There are at least four artist with this name:
1) An old school punk band with female vocals from Rijeka, Croatia. http://www.myspace.com/kaosrijeka

2) An american electronic producer.

3) An italian rapper a.k.a. Kaos One a.k.a. Don Kaos: his page on last.fm is here.

4) An american gangsta rapper from Minneapolis, Minnesota.

5) An american rapper from East Paolo Alto, California
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As a member of Terranova, DJ KAOS worked on the fusion of US Hip Hop and European Electronica. Formerly a part of the Berlin scene as Sprayer, the release of Turntable Terranova?s EP, "Tokyo Tower", and Terranova's contribution to the legendary DJ-Kicks series (1998) gave him an international reputation.

For KAOS, resident DJ at Rio and Cookies (Berlin), Culture Club (Gent) and APT (New York), and now a well-known figure on both the Berlin and international clubbing scenes, the time was ripe for a long player. With "Invent Modest Fires", his Ghost Cauldron project, he created a sinister mix of hip hop, rock, electronica and early techno fused with disco standards.

Between Terranova albums, DJ KAOS not only spin in London's Menage a Trois and Echo is Electric in LA, but he also made a contribution to various projects, such as working with British producer Cameron McVey (All Saints, Sugarbabes) on the Gum project.

On his most mature solo work to date, "Hello Stranger" (named after a Marianne Faithful song) , DJ KAOS has brought together an array of illustrious guest artists. Erlend Oye, Daniel Wang, Matt Safer, Khan and the performance artist Namosh all have their say.