On Jersey Shore you expect fights and threats, but would you expect that from the reality star’s publicists?

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RadarOnline.com has learned that Angelina Pivarnick’s new publicist is battling her old one! And boy is it getting ugly.

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Angelina’s new rep, Bryan Konoski, tells RadarOnline.com that ex-publicist Sibrena Stowe is bullying him.

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Bryan says “now that Angelina is famous and is receiving endorsement opportunities and planning on starting a clothing line, Sibrena is trying to cash in. Sibrena has demanded nearly $15,000 to keep quiet and is apparently trying to shake down Angelina by threatening to sue and also by threatening to trash her in the press unless she starts paying her.”But Sibrena Stowe, Angelina’s ex-rep, contends the money she is demanding is simply payment for services rendered.

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Here’s the hitch, Sibrena and Angelina only had a verbal agreement and Angelina never signed any contract. Angelina claims Sibrena was a family friend and was simply doing the work as a favor, and not in an official capacity.

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Radaronline.com has exclusively obtained emails from MTV to Sibrena about details involving hair and make-up—something a network usually discusses with publicists.

Sibrena says “The money that’s invoiced is a bill for services rendered! Not hush money! As you can see from the emails from MTV and others in the industry I was working for her. We had a verbal agreement that I was to be her publicist, the agreement was to get her enough press & get her back on the show. Who is this guy! He reps a bunch of reality show people, when I represent A-listers. Get a life I don’t need to extort Angelina!”

Sibrena’s client roster includes, Def Jam's Foxy Brown,  Erykah Badu, Chico DeBarge, and Jive Records artist, Mystikal and Petey Pablo.

Jersey Shore star Angelina Pivarnick says the woman who claims to have been her publicist never even worked for her!

“This girl is being malicious, I never hired her or signed a contract,” Angelina told RadarOnline.com in an exclusive interview about Sibrena Stowe of LaChic Media.

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Stowe alleges that Pivarnick owes her money and that she dropped her infamous ‘client’ because of crazy partying ways, RadarOnline.com exclusively revealed on Thursday.

“She parties all the time, she says she has family problems, then bbms (blackberry messages) everyone that she is drunk at the [Jersey] Shore,” said Stowe.

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But Angelina tells a very different story.

“I met her through a friend but she was never my publicist, she claims I owe her $2,500,” revealed Pivarnick.

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“When I texted her asking, ‘What did you do for me?’ she responded, ‘I kept your MTV schedule for you.’ I texted back, ‘My grandmother could have done that'."

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Angelina recalls when she first met Stowe, “She told me I needed to be a diva-girl and act sly and a bitch. I asked around about her and nobody even knew who she was!”

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Pivarnick isn’t worried about Stowe’s angry accusations and threats to sue. “Let her try to prove anything. She never set up one red carpet event or anything for me.”

“I’ve already contacted a lawyer, maybe she thinks she can sue me but she’s not going to get anything,” pledged Pivarnick

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MTV Jersey Shore’s Angelina Pivarnick has been dropped by her publicist Sibrena Stowe, RadarOnline.com has learned exclusively.

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“She parties all the time, she says she has family problems, then bbms (blackberry messages) everyone that she is drunk at the [Jersey] Shore,”  Stowe of LaChic Media told RadarOnline.com.