I got lucky, she's turning 8. Easy....two small round Styrofoam wreaths from Joannes. I bought the cheapest. It's all you need. They can be pricey. I am going to be looking for these at garage sales now! Glue the two "wreaths" together with your glue gun. You have one by now, I know you must. Glue the ribbon on to fit the door and length you want. It will be hidden by the cupcake holders.
Using a pencil, or any long pointy tool, wrap cupcake holders neatly around it. Add a dab of glue from your glue gun and press them gently into the Styrofoam. The glue gun glue is a must! It works like a charm. Keep going until it's full and the shape looks good. I trimmed the edges with the pink and black ribbon to give it more of a finished look. Again, I used the glue gun.
Et voila! Now we just need to hang it.....
I might need a pink and black graphic for her name!