Claim: Narodnozabavni rock is a single by Moi Amon and Kalamari (musical band), released in 2010 and was written by Devina and Leon Oblak.
Evidence: "Narodnozabavni rock" (Folkpop rock) is a song written by Marino Legović and Leon Oblak and performed by Ansambel Roka Žlindre and Kalamari, who represented Slovenia at the Eurovision Song Contest 2010. 
Marino Legović and Leon Oblak