That's right! There is a perfect, flattering haircut that goes well on almost every face type: a little shaggy and a little layered.
Heidi Klum has got it, why not you?
Here are some tips:

Layers:

The key is not too layer too much in back. The best layers are left to the front & are meant to frame the face, but never go above the eye on short hair or above earlobes on long hair.

Don't go too long:

Don't grow your hair more than a few inches above the collarbone. You don't want to like the highschool girl next door!

Go for the 'v-shape cut':

If you have long hair, get your hair cut in the back in a V-shape.
It allows for extra length, plus it's a classic look for long hair that's universally considered sexy.