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The reportedly pregnant Snooki was flashing a rock on her finger yesterday, leading Jersey Shore fans to speculate that the pint-sized reality star is about to tie the knot with her suspected babydaddy. Snooki—née Nicole Polizzi—showed off a gi-normous diamond as she walked her dog with pal JWoww in Jersey City, reports the Daily Mail. Snooks has been looking forward to a proposal from boyfriend Jionni LaValle, reports People, but she's not known as the most faithful girl on the block. In fact, former beau Emilio Masella has suggested Jionni insist on a paternity test. Snooki's attorneys have issued a cease and desist letter to Masella, warning him to keep his mouth shut, reports TMZ. (Read more Jionni LaValle stories.)