OK! EXCLUSIVE: Is JWoww Engaged?

Sporting an impressive diamond in Miami, Jersey Shore's Jenni "JWoww" Farley set off Internet rumors that she and beau Tom Lippolis are set to wed.

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But the rumors are just that: "Jenni is not engaged," an MTV spokesperson tells OK!.

Pals of the reality star deny the story as well.

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"I like him for her," a friend says. "He keeps her grounded, but he hasn't mentioned ring shopping."

Actually, he gave her the ring as a Christmas gift, which she claims prevents guys from hitting on her.