This The Sound of Music photo contains
sombrero, boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, and snap brim hat.
There might also be
dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, pith hat, pith helmet, sun helmet, topee, and topi.
Gwen Stefani's video for "Wind It Up"... why is this in The Sound of Music spot, you might ask? Watch it and you'll find out. Once you get past the initial shock, you'll find it hilarious. ;)