"Jersey Shore" newcomer Deena Nicole Cortese recently told us she brings "a lot of positive energy to the show."

That's at least partly true, if the first episode of the new season is any indication of what's to come as the cast returns from a Miami Beach sojourn. The pint-size Jersey native brings the party from the moment she steps into the Seaside Heights house, declaring, alongside gal pal Snooki, "Party's here!" We won't say what happens next, except that there's a whole lot of positive energy, followed by a seriously negative roomie vs. roomie blowout.

But whether she's kicking back in the rooftop hot tub or hurling insults at fellow castmates, there's no doubt Deena is one heck of an entertaining addition to the hit reality show, which [article id="1654747"]debuts Thursday at 10 p.m. ET[/article].

"I'm like an Energizer Bunny, and you never know what you're going to get. It's great," Deena told MTV News. "I'm very kindhearted and I'm like a kid at heart. That's just me. I love life and I show how much I love life. I'm just being myself."

And being herself, Deena maintains, means being nothing like ex-castmember Angelina Pivarnick (even if they're both trained dental hygienists).

"Me and Angelina have no similarities at all," Deena said. "We're very different. We're completely opposite, like oil and vinegar. I'm very positive. There are ups and downs in the house, but I don't provoke things. I just like everything to be a good time. Positive energy is a blast."

The new season of MTV's "Jersey Shore" premieres Thursday at 10 p.m. ET on MTV.