KACZi (real name Kateřina Kouláková) was born on 13 September 1991 in Frýdek-Místek. She grew up in a musical family, therefore she has tended to musical career since her childhood. Today she says: I feel like at home on stage.

The singer, musician and songwriter began performing in public at the age of 14. She has taken part in several competitions. So far her biggest success has been the first place in the nationwide popular singing competition CZECHTALENT 2012 in Zlín. In the spring of the same year she released her first CD Spring, which has earned her a reputation by wider public. For her song SPRING she made her first official video clip in 2013.

Their elaborate arrangements break borders of pigeon-holing. Their genre is hard to define, and so the band is labeled as world music. .