In a bowl mix crushed pineapple(don't drain juice) and sugar free vanilla pudding (dry) until blended.
Slowly add in 1 c. of fat free cool whip and blend well.
Place the first layer of angel food cake on a plate and spread pineapple filling on top. Place the second angel food cake layer and spread more of the filling on top. Then add the last layer of angel food cake and spread the remaining pineapple filling on top. Garnish with some strawberries, raspberries, blueberries and blackberries.