I'm 25, and have to say, hats ARE fashionable! I will be wearing this hat:
http://www.sunprecautions.com/product.asp?UID=2006062423340578&itemno=4750W06+S+STN
It's expensive, but it has SPF 30 woven right into it, so I don't have to worry about sunscreen on the places of my face where the hat covers. Any part of my face that the hat doesn't protect (lips, chin etc) I do still need sunscreen.
I like this solumbra gear, because I have sun allergies. When the sun touches my body, it leaves nice little bumps in places *sigh* I have what they call "shade sleeves" that I put on my arms when I'm outdoor, and that allows me to still wear a tank top in most places, but have an extra sleeve when I'm out in sun for more than a few minutes

I've already been burned this year just from walking in and out of a Wal-Mart. When you burn within 5 minutes, you're willing to pay a little extra to have great protection

It was actually interesting to buy this stuff. I said I had an allergy, and they put my order on hold and called me about it. I ended up talking to a lady for about 20 minutes, and she told me that what I ordered would be wrong for me, and got me the right stuff. She then wrote all of it down and put it in some type of file, so when I go into the store itself, I can tell them my name and it will bring up my file. And that way, they know my problems as well as what was recommended, and I can get the perfect fit

Hrm, I feel like I've written a commercial haha. Well, it's great stuff, and as a person who burns so easy and has so many problems with rashes and such, I REALLY recommend wearing hats and anything else that will protect your skin. Sure, you won't look as "pretty" with the pale skin instead of the tan, but it's definitely worth it in the long run to not end up with skin cancer. And I'm sure the people who've posted they've survived it agree 100% with that.