Omg, kristen stewart changes her hair

The usually sulky starlet was positively beaming at the New York screening of Twilight Eclipse.
Kirsten's not just gone lighter - she's also working a much more feminine style than usual.
Famed for her couldn't-care-less shaggy mullet and sulky pout, this braided updo is a complete change of direction for the Twilight actress - and she certainly seems pleased with herself!
With beautiful glowing skin and an unheard of huge smile to match, KStew is virtually unrecognisable. What's happened?!
Opinions are split about whether or not Kirsten carries of the blonde, but it's definitely good to see her experimenting with a new look.
The question now is, which will last longer - the blonde or the smiley temperament?