I've been experementing quite a bit with dessert pizze (much to the detrement of my gut), and the cinnamon bun pizza is phenomenal, right up there with nutella pizza, if not better! I basically bake the shell, then spread on some cinnamon spread with a knife. I used a commercial cinnamon spread, but you could easily make your own with cinnamon, sugar and butter. Then I pipe on cream-cheese icing (cream-cheese, butter, icing sugar). The residual heat of the shell causes everything to melt and get gooey. Mmmmm. Cut and devour; it is a real hit.
