The Dixie Chicks are sporting a new diamond. The trio's 1998 debut, Wide Open Spaces, has sold more than 10 million units, earning the Chicks their first Diamond Award from the Recording Industry Association of America, the organization that certifies gold and platinum recordings. The RIAA established the Diamond Award in March 1999 to honor sales of 10 million or more copies of an album or single. About 60 acts have received Diamond Awards, among them country artists Garth Brooks, Kenny Rogers and Shania Twain. In addition to the popular title track, Wide Open Spaces includes the hits "There's Your Trouble," "I Can Love You Better" and "You Were Mine." For those keeping score, the Chicks' second album, Fly, is certified at six million.