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  Twitter: Deena Nicole Cortese
  "Jersey Shore" Star Deena Nicole Cortese

"Jersey Shore" star Deena Nicole Cortese has denied recently undergoing any new plastic surgery, following new speculation that she has drastically altered her appearance.

"I have not got any plastic surgery ... yes in the past I have had a nose job." Cortese recently wrote via her Twitter page.

"I am not afraid to ADMIT I got plastic surgery. I thinned my eyebrows..and lost weight thanks to the @freshdiet .. and learned how to do my makeup..lighter eye shadow brings out my eyes..and highlight under my eyes gives an effect of higher cheek bones.. the end. If I get the nose job I'll let ya know =]" she wrote.

The 25-year-old reality TV star recently came under fire after new photos displayed what some critics suspect is extensive facial plastic surgery.

Cortese has never been shy about her previous experiences with plastic surgery, once admitting that she underwent a surgical procedure to improve her nose.

"I actually had a nose job," she previously told Page Six also adding that to people who get plastic surgery she says, "more power to you!"

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Cortese's appearance has become a hot topic on social networking site Twitter with many users weighing in on the MTV's star's new look.

"OMG Deena from Jersey Shore looks like a diff person with all that surgery," Laura Diaz Tweeted.

"@DeenaNicoleMTV you look so different then the Deena we see on Jersey Shore. Love the new you!" Megan M tweeted.

"So deena from jersey shore got a nose job, she looks good with it tho so its cool lol," Ashley Cintron tweeted.

Cortese once spoke out about her health routine, which has undoubtedly impacted her new appearance.

"I've just been watching my carbs and running...I definitely have lost weight since last season," Cortese once told Hollywood Life.