This MJ 'S ROBOT DANCE photo contains
fedora, felt hat, homburg, stetson, trilby, boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, and snap brim hat.
There might also be
well dressed person, suit, pants suit, pantsuit, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, and beaver.