By Jen Heger - Breaking Celebrity News Assistant Managing Editor

Eddie Cibrian's ex-wife, Brandi Glanville, one of the stars of Bravo's The Real Housewives of Beverly Hills, has been partying hard during filming recently and is turning into the new mean girl on the reality show, Breaking Celebrity News is exclusively reporting.

Listen! 'RHOP' star Wendy Osefo breaks down the “most intense fight in the show's history” in under 2 minutes.

As we previously reported, fellow “Housewife” Taylor Armstrong has also been hitting the bottle and had a catastrophic meltdown during a recent trip to Ojai, which left her co-stars fearing for her future if she doesn't seek treatment for her drinking.

"Brandi has been extremely chummy with Lisa Vanderpump this year," a source close to the situation tells Breaking Celebrity News. "She just doesn't seem to be in a good place right now, and she has been definitely hitting the bottle a lot harder this year during filming, which is cause for concern. Brandi becomes much more aggressive when she drinks and she is turning into the new mean girl on the show. It's hard to tell if it's the alcohol that is the cause for the dra