Lisa Rinna News: 'RHOBH' Returns For Season Six, Vanderpump Says She's In A 'Hot Mess' [VIDEO]

Have Lisa Rinna and her co-star, Lisa Vanderpump, had a falling out?

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While Rinna and Vanderpump were close during season five of The Real Housewives of Beverly Hills, the first season for the former soap star, their relationship appears to have taken a turn for the worse during production on season six.

"[Lisa Rinna]'s right in the middle of a hot mess," Vanderpump tells cameras in a sneak peek shared by PEOPLE Magazine on Tuesday.

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As Vanderpump's comment was made, Rinna was seen preparing for an interview on Oprah Winfrey's Where Are They Now?

"I'm still here," Rinna tells cameras in her own confessional. "I'm not going anywhere. You know I'm like a cockroach, you can't get rid of me."

Meanwhile, in a separate scene, Eileen Davidson is seen embarking on a new storyline on the long-running soap, The Young and the Restless.

"I happen to be in this little love triangle with my daughter and her boyfriend," Davidson explains of the role. "I thought I hadn't done this storyline ever before, and then I realized I actually did it 30 years ago, but I was the daughter."

For more of the ladies of Bravo, tune into the sixth season of The Real Housewives of Beverly Hills, premiering on Tuesday, Dec. 1, at 9 p.m., and check out a sneak peek clip of the new season below.