Giovanna "Gia" Spumanti and her cousin Isabella "Bella" Rizzoli are going to have the sexiest summer ever. While they couldn't be more different--pint-size Gia is a carefree, outspoken party girl and Bella is a tall, slender athlete who always holds her tongue--for the next month they're ready to pouf up their hair, put on their stilettos, and soak up all that Seaside Heights, New Jersey, has to offer: hot guidos, cool clubs, fried Oreos, and lots of tequila.

So far, Gia's summer is on fire. Between nearly burning down their rented...