Here is a picture of Miu Miu's bejewelled heels, I've created something similar but much more rhinestoned and a merge of colours

With your chosen pair of heels use the glue gun to glue the rhinestones to the back heel of the shoe, start with glueing the large rhinestones I chose to make a line of larger rhinestones going down the centre of the heel but it is up to you on the arrangement of the stones.
I used a pair of fake swede pumps and found the glue easy to stick to them and relatively easy to peel off when need be.

Using the tweezers pick up individual rhinestones and glue the back of them, quickly place them how you like unto the shoe.If the glue seeps out from underneath the rhinestone DO NOT WAIT FOR IT TO DRY. Using the same tweezers peel the excess glue away while pressing the rhinestone to the surface to make sure all the glue is not taken away

Repeat however many times you feel necessary, I only bejewelled the back of the heels but go as far as you like!
Here is a picture of my finished product:)