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Who knew something like lip injections could reopen old wounds?

Angelina Pivarnick was briefly a household name after she decided to leave "Jersey Shore," twice, during the show's first and second seasons. While some her costars went on to become full-on brands, the self-titled "Kim Kardashian of Staten Island" kind of vanished into obscurity.

It seems the only way she can get attention now is by dragging her former housemates in public -- as she just bashed Nicole "Snooki" Polizzi over her lip injections in a new interview.

Turns out, Angelina recently got plumped up as well -- and is the one who referred Snooki to her doctor.

"She's trying to copy my look," Pivarnick tells In Touch. "It's funny how she goes and gets her lips done at the same exact place that I got mine done. Yeah, so now all the times on [Jersey Shore] she used to call me ugly, now she's trying to look like me."

"I don't really think [the new lips] are doing much for her to be honest with you," Angelina adds. "I don't know what the hell that's about but, whatever. But with me, I look totally different with it, you know?"

Snooki caught wind of the article and called her former costar out on Twitter.

Damn I thought she changed.I gave her a compliment about her lips & she referred me to her doc.We're grown adults cmon girl. #dissapointed 😔 https://t.co/kvRIHzO1CN @snooki

That prompted a response from Pivarnick:

@snooki @intouchweekly when I tried to contact u to thank you for that u ignored me. We need to grow up and put things past us. I tried @angelinamtvjs

Which led to one final message from Snooks:

Sorry I didn't get back to you. But "you tried" by talking crap about me to a magazine? 😔 all love here, just baffled. https://t.co/zIDLW6vAQi @snooki

Pivarnick continued tweeting, saying she wasn't "talking crap" ... even though she clearly was. "I tried to be cool for so long," she continued, "U didn't have the decency to be cool back. We all moved on. It's time we do."

Snooki opened up to toofab about her decision to plump her lips last year.

"I hardly read the s--t people say because I couldn't care less," she told toofab's Rachel Hoffman. "All my friends said that it looks good. It's something that I've wanted to do for a long time but I was really nervous about it. I finally got the courage to try it out."

"A lot of people said it's the worst pain ever, but it's really not that bad," she added. "I'm terrified of needles and it was literally a little pinch. I'm excited that I got it. I mean, I definitely don't want to over do it, so I think the size that I got is perfect. Once it starts to go down, I have to go back and get more, but I like where it's at now. I have a little plump because I didn't have an upper lip before. I'm happy where it is."