First, take a print out of the crown pattern and lay it on top of the felt and cut out the felt.
Using hot glue gun glue the ends of the crown together.
Now cut out a felt circle for the bottom of the crown from the white felt, so that it would match the plastic clip.
Then sew the felt onto the inside the crown so that it isn't visible from the front.
Finally, cover the entire clip with hot glue and press it onto the bottom of the crown. Your beautiful felt crown clip is ready!