This Hayden Panettiere photo contains
boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, snap brim hat, and sombrero.
There might also be
dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, pith hat, pith helmet, sun helmet, topee, topi, cavalier hat, and slouch hat.