A Celebrity Hairstyle Tip, Courtesy of The Hills

Don't fret, readers: Getting Lauren Conrad's silky-smooth waves or Audrina Patridge's super straight 'do doesn't need to be a battle this summer.

We've already talked about Lauren's signature braid, but how does she keep the rest of her gorgeous hair from frizzing out of control in the humidity?

The best way to fight summer frizz, says a well-known celebrity stylist who works with The Hills stars, is to get a good anti-humectant product.

Failing that, you can just run a little of any essential oil through your hair - or even a light lotion if your hair is fine.