This Michael Jackson foto contains
filzhut, homburg, stetson, trilby, fedora, and stetson trilby.
There might also be
porkpie, porkpie hut, boater, leghorn, panama, panamahut, seemann, skimmer, hut stroh, bootsfahrer, bein, strohhut, livorno, panama-hut, kampagne hut, and kampagnenhut.