After setting a rating high on the season finale of ‘Jersey Shore Family Vacation,’ the renewal is here!  That’s right those crazy kids from the Jersey Shore will be coming back for a fourth season.  The comeback of Jersey Shore has been a good decision by the folks at MTV. The show has become its second-highest-rated series in the 18-34 demo behind ‘The Challenge: Total Madness” In fact, ‘Jersey Shore Family Vacation’ season three was the highest-ranked cable series in its time slot with ratings 9 percent higher that season two.