1Mix in bowl: Cool whip, cream cheese and sugar. Beat at medium speed until smooth. Set aside. Slice 1 1/2 bananas and arrange in pie shells. Pour blueberry pie filling on top. Spread 1/4 of the cool whip mixture on. Repeat the layers ending with the cool whip mixture. Chill 1 hour before serving. (Lot's of bananas makes it good)!