Cranberry Margarita

A gorgeous and festive holiday drink that tastes divine!  I tore this recipe out of a magazine and can't identify where it came from but I'm thankful with every sip. This drink is not super sweet so if you like it sweeter, add a few tablespoons of sugar to the mixture.
Note added 12/22/13: I realized that the blending instructions were not very good so I have revised them a little.

1 can frozen cranberry juice cocktail concentrate (or cranberry-pomegranate), thawed
1 1/2 cups tequila
2/3 cup orange liqueur, such as Triple Sec or Grand Marnier
1 can jellied cranberry sauce
10 T fresh lime juice

Blend all the ingredients except the alcohol in a blender; pour out the margarita base into a pitcher and add the tequila and triple sec; stir well. Blend 2 cups of the margarita mixture along with 3 cups of ice until it's frozen like a Slushy. Pour into (salt-rimmed, if you like) glasses and repeat until the mixture is gone. There are about 5 cups total of the mixture, so for that last 1 cup of base you use
1 1/2 cups of ice. You can store the blended margarita you haven't consumed yet in the freezer until you're ready drink it.