And these are more than just glamour shots.
In one photo, all four guys (shirtless, of course) hold a colossal sandwich while Refaeli takes a bite from the other end wearing a revealing black bathing suit and stilettos.
Other steamy photos feature Refaeli sitting on Mike "The Situation" Sorrentino's shoulders, pulling "Pauly D" Delvecchio's head toward her chest and wrapping her legs around Ronnie Ortiz-Magro's hips. Vinny Guadagnino's photo is less risqué: He simply stands beside Refaeli, who's wearing a teeny string bikini.
Check out all the photos here.
Meanwhile, "The Situation" is also featured in a new Vitamin Water ad, in which Sorrentino helps New York Mets star David Wright with "situational training" for baseball season.
What do you think of the photos and the ad?