Key Lime-Banana Smoothie

1 container (6 ounces) Yoplait Original Key lime pie low-fat yogurt
1 ripe banana, sliced
1/2 cup milk
1 tablespoon lime juice
1/4 teaspoon dry lemon lime-flavored soft drink mix (from 0.13-ounce package)
1 cup vanilla frozen yogurt

Place all ingredients except frozen yogurt in blender. Cover and blend on high speed until smooth. Add frozen yogurt. Cover and blend until smooth. Makes 2 servings (1 cup each)