1 box yellow cake mix (Duncan Hines only)
4 eggs
1/4 c. oil
1 (11 oz.) can mandarin oranges (use juice)
1 can crushed pineapple, drained

Mix ingredients in cake. Mix and bake as instructed on box. Cool cake.

Frosting:

1 large box vanilla pudding (instant)
1 small can crushed pineapple (use juice)
1 small can mandarin oranges, drained

Dissolve pudding in pineapple with juice. Fold in 8 ounces Cool Whip. Frost cake and refrigerate.