Johnny Cash

The provided articles do not focus on Johnny Cash. The first article discusses instances of international music stars attempting to sing in German, and mentions artists like Lady Gaga, Frank Zappa, and others. The second article features Bonnie Prince Billy (Will Oldham), discussing his life as a family man and his recent European tour. Neither article provides any information or context related to Johnny Cash. Therefore, it is impossible to provide a summary about Johnny Cash based on these articles.