Blake Shelton and Miranda Lambert's shocking an**uncement that they would be divorcing after four years of marriage rocked the country music world and its fans. However, ahead of Monday's (July 20) an**uncement, those who are close to the couple admit that the break up has been a long time coming. According to new reports, Shelton and Lambert have been living "separate lives" for some time **w but had only just gotten the courage to pull the plug on their relationship for good.