AP Photo/Shea Walsh, Fame, Wenn

Actresses are being sheared all over Hollywood like little blond sheep. Seems we can't toss our hair without hitting another girl getting a bob: Tori's crop came with her second pregnancy, while Reese's shorn locks seemed to coincide with warmer weather. And the newest 'do gives cute little Hayden Panettiere a sophisticated glamour.

Now get ready for winter's look: blond starlet-hair sweaters.