This Beyonce photo contains
boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, fedora, felt hat, homburg, stetson, trilby, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, and beaver.
There might also be
porkpie, porkpie hat, snap brim hat, pith hat, pith helmet, sun helmet, topee, and topi.