As much as she tries!!
The chin straps are a must...I went out and impulsively bought hats without them, and cannot keep them on the girls...but they can't get these off...although Tess hates hers, and cries the entire time it's on...probably doesn't help that I snapped her chin the first time I put it on...poor thing.
Of course she doesn't cry when I take the photo...this camera is a great way to get the kids to make a happy face for some reason!
The hats are at Children's Place for $5ish...I think one was a little more because it's linen.