The fourth season premiered in autumn 2015 with castings held in Prague, Brno, Ostrava, Žilina, Bratislava and Košice.
Auditions were held in Bratislava, Košice, Prague, Ostrava, Žilina and Brno in the summer of 2015.
The contestants first emerged on stage in groups of 9 or 10 but performed solo unaccompanied, and those who did not impress the judges were cut after the group finished their individual performances.
20 semifinalists will revealed in October when the show premiered on screen.
The first single recorded by TOP 8 is cover version of Česko Slovenská SuperStar 2009 theme song "Príbeh nekončí" (The Story Doesn't End).