Margaritas are so yummy but oh so fattening. Help is at hand with two more choices in the Skinnygirl line of 21 cocktails, wines and vodkas. There’s a Skinnygirl Sweet’arita and a Skinnygirl Sparkling Margarita. The maker, Beam Inc., says they are under 100 calories per serving but that depends on the size of the drink. We checked and found a regular 3.3 oz Margarita has 153 calories. Still, saving 53 or more calories counts! They retail for around $12.99 a 750 ml bottle.