1st place: Tequila on the Rocks
2nd place: Light Beer
3rd place: Gin and Tonic
A crisp G&T has more calories than an eight-ounce cola. Light beer is better; its carbonation will make you feel full without the added sugar. But the lightest libation is a shot of tequila (or any hard alcohol): "We sip liquor and gulp cocktails and beer," says Wendy Bazilian, coauthor of The SuperFoodsRx Diet. "Gulping equals more empty calories."