This time it's not Blake Shelton making headlines -- it's his mother!

As a coach on NBC's hit talent show The Voice, his mother Dorothy Shackleford is sure to be supportive of his gig, but Breaking Celebrity News has exclusively learned she's taken it a little further, bashing the competition on Twitter — particularly American Idol coach Nicki Minaj.

"Those poor kids on idol don't know what to do, its [expletive] if you and [expletive] if you don't! Sh*t they don't know wht to do," she tweeted a few weeks ago.