Vinny Guadagnino hinted he had a surprise in store for Jersey Shore fans early Friday morning -- and no one was more shocked than Snooki!

"I will be in studio live with a Halloween surprise you don't wanna miss!" he teased on Twitter.

Hours later, the reality star, 21, and Ronnie Ortiz-Magro, 23, tweeted a photo of themselves backstage at MTV's The Seven in full Snooki and Pauly D inspired attire.

Though Guadagnino called it "the most epic Halloween costume ever," his pint-sized costar (real name: Nicole Polizzi) wasn't as amused.

"Really boys?" she responded.

Tell Us: What do you think of Vinny and Ronnie's costumes?