Blueberry Pomegranate Margarita

Picked this recipe card up at Dos Caminos in New York City.

1 1/2 oz Gran Centenario Plata Tequila
1/2 oz triple sec
1/2 oz lime juice
1 oz blueberry pomegranate juice

Fill cocktail shaker with ice and shake all ingredients twenty times. Strain over rocks glass filled with fresh ice. Garnish with three blueberries