Dieter "Machine" Birr, who is still regularly on stage at the age of almost 80, has two famous role models: "Keith Richards and Mick Jagger are even older and still active," the singer told the German Press Agency.

And: "I'll carry on as long as I can - and I don't have to be ashamed." According to the ex-Puhdys singer, reasons for not performing anymore would be "if you're no longer good enough, people don't come anymore or it becomes too physically demanding." The most important thing is that you are credible. And something else is important for the senior rocker: "I want it really loud on stage and the people can really hear me."