Don't mess with the always beautiful LeAnn Rimes!

The 30-year-old country cutie ... rockin' white skinny jeans, sky-high Christian Louboutins and a killer new 'do, visited Jimmy Kimmel Live and took an opportunity to give her thoughts on Brandi Glanville and the Real Housewives of Beverly Hills.

Rimes, who says she doesn't watch the reality show, told Kimmel:

    "I do know what's going on [the show] because I have to deal with my publicist every Monday. I think it's kind of interesting how it seems one-sided most of the time. But then, you know, you just kinda get fed up with people lying about you ... I usually don't engage [in the feud] but there comes a time when you're just like, 'Screw you.' That's it, and that's all you wanna say and you're like, 'I'm done with this now," for like another three months."

LeAnn's upcoming album Spitfire hits stores on April 9. We can't wait to hear it!