updated 09/07/2012 AT 11:00 AM ET
•originally published 09/07/2012 AT 1:00 PM ET
Call him Uncle Pauly D!
“That baby is adorable,” he says of Lorenzo, who graces the cover of PEOPLE this week. “He already has hair! We are doing a blow out!”
“I enjoyed doing it,” he says of filming in Seaside Heights, N.J., one last time. “I’m excited to show the world that season. It’s the last one. So, we went out with a bang.”
For exclusive photos of Lorenzo – plus details about Polizzi’s delivery, upcoming wedding, weight loss plan and life as a mom – pick up this week’s issue of PEOPLE, on newsstands Friday