Tina Turner and Erwin Bach, her record producer beau of 27 years, are making things official. Sources tell the New York Post the couple, living together in Switzerland since the 1990s, will wed July 21 either at their Lake Zurich home (according to some sources) or at their French Riviera villa (according to others). Turner, 73, recently said she is "happier than I could have ever dreamed of." (More Tina Turner stories.)