This is the very sweet 19 yr old Chih Jou Chen.
Here's what Grazia had to say about her:
"Where Marc Jacobs goes, the fashionable crowd will follow – and his
autumn/winter’12 runway must be where Chih’s kooky hat-spiration has
come from! By wearing hers with this neat Marni cardigan, blouse and
paper-bag waist skirt from D-Due the look is super-cute, but her Epice
fabric tote stops it from veering into kitsch-dom"
As always get into the debate on why you do or don't like this outfit at Grazia Daily