I got this recipe a couple years ago from a work potluck. This is seriously healthy, with all of the sugar-free and light ingredients. Another great summer recipe.
16 oz plain lowfat yogurt
8 oz lite cool whip (thawed)
1 large box sugar/fat free instant vanilla pudding
1 large can mandarin oranges in juice (drained)
1 regular can pineapple tidbits in juice (drained)
1 cup to 1 1/2 cups grapes
Mix yogurt, cool wihp, and pudding together. Mix in fruit and chill.