Are one of country music's cutest couples having marital problems? 'Life & Style Weekly' would like you to believe BLAKE SHELTON cheated on MIRANDA LAMBERT with some 23-year-old singer, because that's what it says on the cover of their new issue.

According to, the actual 'Life & Style' story only talks about how Miranda is  worried Blake is cheating, so she follows him around.

Miranda has three foolproof 'rules' for making their marriage work: Face time every two weeks, she can check his texts and she gets to chaperone him on 'The Voice'.

By the way, the 23-year-old singer is probably CASSADEE POPE, last season's winner on 'The Voice.' She was on Blake's team and performed 'Over You,' which Blake and Miranda wrote about his brother's death.

I'm guessing this trash is just another way for magazines to sell more copies.  I don't believe a word of it.  Although, if it IS true, Blake better run far, far away.  Miranda will kick his butt!