By Jen Heger - Breaking Celebrity News Assistant Managing Editor

Despite the ad campaign to the contrary, what happens in Vegas doesn't always stay in Vegas!

The Real Housewives of Beverly Hills hit up Sin City last week, and Breaking Celebrity News has exclusively obtained a full rundown of their crazy booze fueled antics that resulted in tears, fighting and drama galore!

As we previously reported, the cast was in Las Vegas  to shoot a special episode of the show. Eddie Cibrian's  ex-wife, Brandi Glanville, is taking pole dancing lessons in preparation for a sexy new gig hosting bachelorette parties and brought the other ladies along for a "trial run."

Brandi, Lisa Vanderpump, Kyle Richards, Yolanda Hadid and Camille Grammer were all along for the ride, but noticeably absent were Taylor Armstrong and Adrienne Maloof, the latter of which was unable to go because of a prior commitment.

"The ladies were bickering and going at each other's throats from the moment they left Los Angeles and didn't stop until their private jet brought them back home," a show insider tells Breaking Celebrity News. "Brandi appeared to be under the influence of alcohol the entire time and was acting pretty outrageously. There is a lot of bad blood right now among everyone, and