Disambiguation; There are 8 Groups with the same name.
1) A death metal band from Poland started in 2004;
2) A rave/happy hardcore group from The Netherlands, popular in the Mid-Nineties. Critical Mass was formed in 1994 by Ed Bout and Dave Hasselaar. ID&T records (the centre of hardcore at that time) wanted a live act. At the beginning both producers where the act by themselves but not much later they integrated the singer Ludmilla Odijk and rapper Danny Haenraets…
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