Leighton Meester
I think she looks A LOT like Leighton Meester (from Gossip Girl). Especially when she smiles. They have the same smile.
Leighton:
http://www.celebrity-gossip.net/images/photos/leighton-meester-gossip- girl-set.jpg
http://img84.imageshack.us/img84/8408/epartrs5.jpg
http://farm2.static.flickr.com/1147/1398628113_51057e6c04_m.jpg
http://cache.daylife.com/imageserve/0fCg5873VO5wy/340x.jpg
http://upload.moldova.org/movie/actors/l/leighton_meester/thumbnails/t n2_leighton_meester_3.jpg