Nightmare Before Christmas Cake!

Talk about a FUN cake to make! Because this cake was for a girl turning 9 (who LOVES the Nightmare Before Christmas) & her parents - I just did a single layer 8" cake that I cut in half & filled with chocolate buttercream filling topped by a single layer 6" cake prepared the same way. The cake was marble & I "dirty iced" it with the same chocolate buttercream icing. The decorations are vanilla buttercream.