This Michael Jackson photo contains
fedora, felt hat, homburg, stetson, trilby, boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, porkpie, and porkpie hat.
There might also be
dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, snap brim hat, and business suit.
For those of you that don't know what polyvore is, it's a website where you create sets with pictures, outfits,music and that kind of stuff. Basically showing your fashion sense and interests. It's really fun.