blue margaritas

my brother-in-law asked me today for a great magarita recipe and this is my only one (it happens to also be my favorite margartia).  see, ask and you shall recieve!

1 (10-ounce) can frozen margarita mix
3/4 cup tequila
1/4 cup blue curacao liquor
2 tablespoons lime juice

1. combine all ingredients in a blender
2. fill the blender with ice to the 5-cup level
3. process until smooth and serve immediately