By Jon Boon - Breaking Celebrity News Reporter

LeAnn Rimes staged a bizarre barefoot performance at a concert in California and couldn't wait to give Brandi Glanville a jab.

The 30-year-old country star appeared Wednesday night at the Civic Arts Plaza in Thousand Oaks clad in a figure-hugging leather dress in front of around 1,800 people where she kicked off her heels and sat down on a rug on stage during the end of the show.

And LeAnn couldn't help but aim a dig at the expense of The Real Housewives of Beverly Hills star. She mumbled to her audience: "Anybody ever been pissed off at some point and you just couldn't get it out. And if you did, you actually might dig yourself a deeper hole, so you just let the other person dig themselves a hole?"

Glanville, her ex-husband Eddie Cibrian and his wife LeAnn have been feuding over whether one of their kids ate a laxative belonging to LeAnn thinking it was candy.

As Breaking Celebrity News previously reported, the warfare started after concerns of parenting for Brandi and Eddie’s two sons, Mason and Jake.

"People around Brandi started getting vocal a few weeks back about their worries concerning her parenting of the boys," a source close to the situation told Breaking Celebrity News.

PHOTO: LeAnn Rimes & Brandi Glanville -- BFFs?

"Numerous different people told Brandi, 40, that they were concerned that when she had her sons with her she wasn't paying enough attention to them and was distracted with everything else going on in her life."