MIRANDA LAMBERT - I DIDN'T CHEAT ON BLAKE, HE CHEATED ON ME !

   Miranda Lambert said she was never unfaithful during her 4 year marriage to Blake Shelton ... but he was unfaithful .

It’s a classic case of he said/she said … but sources close to Lambert say Shelton’s the one who strayed ... with a famous country singer no less.

The sources claim Blake's camp was unscrupulous, and threw mud with the help of a powerful PR firm that attacked Miranda before the ink was dry on the divorce docs.

We're told she's incensed Blake accused her of cheating with a country musician. She says it never happened, and so does the singer.

As we reported, the divorce is so bitter, Blake ordered Miranda to clear her exotic animalsoff his Oklahoma ranch the very day the judge made the divorce official.

Credits: TMZ