The "Pump Rules" OG opened up about the progression of the show and its newest cast members in a recent interview with Jenny McCarthy on SiriusXM's "The Jenny McCarthy Show," leaving nothing off the table.
When Jenny asked Stassi if she had ever acted out or started a fight just to get more screen time, Stassi said, "Honestly, I was there from the beginning, so I don't feel like I ever really had to."
"I don't really feel like any of the original cast members have to prove themselves," she continued. "We're all such great friends and we have history and we're like family and we started this together. We're so ride or die with being honest and making a great show."
While Stassi did admit that it "must suck" for newcomers to try and mesh with a group of real friends who've been on the show for seven seasons, she doesn't "feel that bad" for them and wishes "they would just leave."
"They come in and they think they're about to be a star, and it's like, 'You have no idea what's coming for you,'" she said.
When Jenny asked her guest which castmember was "most guilty" of trying to force their way into stardom, Stassi replied, "Billie Lee."
"It's just the things she tries to fight about are ridiculous," Stassi said before quoting "Mean Girls." "'You don't even go here!' That's what it feels like."
"If she was actually nice and kind and friendly to us, I think she would [fit in], but to just expect to be invited to every little thing we do, when we don't know you, and pitch a fit when you're not ... acting like we've been friends for years? You just met us, so no, you're not coming to my little four-girl wine night," she added.
Billie responded to Stassi's comments, noting she's never sought her approval.
"I've never fought with Stassi, and I for sure never tried to be BFFs with her," Billie told PEOPLE. "I don't recall missing out on a wine night of only four? So to call me mean is another crazy accusation. I've barely hung out with her, but thus far, our interactions have been nothing but kind."
"And to call my 'fights' ridiculous? It's ridiculous to want to be included? It's ridiculous to want diversity and inclusion at the workplace? Shame on her," she added.
"Vanderpump Rules" airs Tuesdays at 9 p.m. on Bravo.