Richard Müller at The Concert for Martina and Ján in Gregorovce The concert for Ján and Martina will also feature a performance by the Czech-Slovak legend Richard Müller. He's an artist with an impressive career who's still got a lot to offer even after more than 30 years on the scene. He writes new songs, plays successful concerts and starts unusual projects. Richard is, just like most people, horrified by the story of Ján and Martina. He wants to support their families this way and to contribute to making sure they're not forgotten. He'll sing the greatest hits of his impressive career, such as "Po schodoch", "Cigaretka na dva ťahy", "Milovanie v daždi" and many more.