Stars & Their Pets: The Situation's Heavy Lifting

Gym, tan … dog walking! Jersey Shore star Mike “The Situation” Sorrentino does some weight-lifting – er, puppy-lifting – on Saturday while out and about in Seaside Heights, N.J.

Meanwhile, castmates Jenni “JWoww” Farley and Nicole “Snooki” Polizzi pull double doggie duty, ditching their liquor for leashes during a walk through Seaside Heights on Saturday.

A day before hitting the courts at the U.S. Open, the tennis star enjoys a Sunday stroll through New York City with his big bulldog.

Think she makes him laugh? Funny girl Silverman leads her dog, Duck, through their West Hollywood, Calif., neighborhood on Sunday.

Work it, girls! The former American Idol judge and her lovable pup, Tiki, get rolling in Los Angeles on Sunday.