Watch out, Jersey Shore, there's a new Guidette coming to town! "Jersey Shore" alum and current star of MTV's "Snooki & JWoww," Jenni "JWoww" Farley, revealed Wednesday that she is expecting a baby girl with her fiance, Roger Mathews.

The 27-year-old reality star announced the baby's sex in the latest issue of Us Weekly, calling the gender news "exciting" and "super emotional" after months of believing her unborn child was most likely male. "I pictured a boy this whole time," said Farley. "So when I saw 'girl' on the paperwork, I was like 'No way!' But deep down I think I knew."

What is the mom-to-be looking forward to doing with her little girl most when she arrives in July? Spoiling her rotten, of course! "She will be my best friend and daddy's little girl. I can't wait for everything from her first steps to her first dance class," said Farley, who shared that Mathews, 37, is already prepping for getting their unborn daughter a car when she turns 16. "He was just saying today what kind of car she'll get for her sweet 16 if she gets good grades," said Farley. "I'm like, 'Pump the brakes! Let's get through the first 16 months!'"

While the first-time parents are excited over their pending arrival, they are already concerned about dealing with their daughter's future teenage angst. "I was a teenage girl once, and, boy do I know how sneaky we can be!" said Farley, who jokingly added that "karma" is going to seek its revenge on her.

Farley first revealed she was expecting on her official blog on Christmas Day, calling the pregnancy the best holiday gift, saying, "We are so excited to share this new chapter of our lives with you as we become parents and create more memories with a new addition to our family. … We are extremely happy and cannot wait for our bundle of joy to arrive!"