Hellcats is an old school heavy metal bend from Slovenia and is the first all - female metal band from there. It was formed in Ljubljana in 2003 by sisters Sasha and Sonja Zagorc who have started to perform together in their childhood, when they were still in music school. Sasha was studying classical guitar and Sonja flute. Later on Sonja switched to drums and they formed a girl band. Due to the small size of Slovenian music space it wasn't easy to find many female musicians.