Country music superstars Blake Shelton and Miranda Lambert said on Monday they have divorced after four years of marriage. Shelton, a judge on the popular TV show “The Voice,” and Lambert made their announcement following years of gossip in celebrity magazines that their marriage was in trouble. The couple said in a statement issued through their representatives, “This is not the future we envisioned and it is with heavy hearts that we move forward separately. We are real people, with real lives, with real families, friends and colleagues. Therefore, we kindly ask for privacy and compassion concerning this very personal matter.” The couple began dating about nine years ago and sang and wrote tracks for each other on various albums before they married in May 2011.