This time

we were rooting against human trafficking, so we supported a good cause and went to a concert at the same time... I missed the first band, and one band missed us (die to illness in the band), but I saw these ones and I will show a photo of each as they all did their bit for a good cause :

 Marta Kosturska & Ethnusiasm

 Pliš & Murat

 Niet

 Zlatko

(And yes, looking at the photos it does seem that the singer is usually the frontman (or woman) of the band)