For the top, I think I would try making rounds of smaller shells, going down to 6 dc, then then etc
How to Crochet Flowers Multi Petals
Crochet Flower Stitch worked in continuous seamless technique
How to: Reverse Single Crochet (rev sc)
Not a loom knitting pattern but great inspiration! Twenty Something Granny: Knitted Baby Bow Hat. Looks like the bow piece needs to be a little bigger so it's fuller on the finished hat, but this is so adorable!