Grapefruit Smoothie

1 1/2 cups grapefruit juice, freshly squeezed is perferred
3/4 cup of sliced pineapple
1/4 cup of pineapple juice (this will sweeten it up nicely)
1 cup plain low-fat yogurt
2 cups ice
Optional: feel free to add a scoop of ice cream for an even
sweeter taste.