I got this recipe from Madhuram's Eggless Cooking, you'll find lots of egg-less ways of making delicious things. Link for it is below:
I just knew if I was to find a way to make frosting icing sugar-less, it would be on allrecipes.com and sure enough it was. Link for it is below:
Michael's Crafts have these Princess liners that look like crowns. I got some plastic princess cutouts and put them on top. The icing was swirled purple and pink. Got to use the Batter Babies to separate the colors and they came out great!