No stranger to partying at the Jersey Shore, Nicole \u201cSnooki\u201d Polizzi was back at it with a joint birthday bash for her mini meatballs. To honor Lorenzo\u2019s fifth birthday and Giovanna\u2019s third, she outfitted her New Jersey pad with fake flowers and tossed floats into their backyard lagoon. \u201cThey love Moana,\u201d the MTV alum, 29, exclusively explained to Us Weekly. \u201cSo I went with a luau theme.\u201d While she looked the part \u2014 dressed in a grass skirt and seashell-inspired bralet \u2014 her loved ones ran the show. Mother-in-law Janis whipped up penne alla vodka while husband Jionni LaValle, 30, took the kids out on their boat. Snooki noted, \u201cMy aunts, my mom and my dad usually take care of everything, which is great. Then I can talk to guests.\u201d Scroll through to see pics from the big day.