As self-proclaimed "mad hatters," we'll be the first to say that we've never met a chapeau we could walk away from. That said, we might have an issue on our hands—er, heads?—come fall, as hats are now a must-have accessory and available everywhere in a bevy of rich colors, luxurious textures, and playful shapes. We've rounded up some examples of the season's top-notch toppers (and the stylish celebs who wear them), so click through to see them all!