Summer is a time to let loose, but don't let too loose says Newsweek. When the mercury rises, so do the calories in some of our favorite alcoholic beverages. Here are the top six cocktails that'll do a number on your diet: Margarita. If you use a sugar-saturated Margarita mix, add tequila or Triple Sec, and then pour the drink into a salt-rimmed glass, the result could set you back 850 Read more