Pauly D may have turned 31-years-old yesterday -- but he celebrated like a kid!
With surprise guests including his mother and other family members, "Jersey Shore's" resident DJ hit the Seaside Heights boardwalk to go on every single ride -- including a roller coaster. He was also seen holding a sign reading "Happy Happy Birthday!!!"
Pauly isn't the only cast member to celebrate his birthday this week, as Mike "The Situation" Sorrentino turned 30 on July 4th.
One person who didn't take part in any b-day festivities: Vinny, who left the house over the weekend for good.