Butterfly Rainbow Cake

This cake is for a wonderful lady's 80th birthday!  While it didn't come out exactly like I had imagined it, I was still very happy with it.  It was about 2' tall, 9" round at the base.
I cheated on the butterflies.  I used paint chips and a great little Martha Stewart punch.  I know, I should have made the 100 butterflies out of gumpaste - but I'm lazy, and nobody minded.  It's buttercream frosting and filling covering chocolate and almond cake.