She's Sofie (or Sophie?) from clubseventeen (and some other sites)
http://peachyforum.com/forums/t/158085.aspx
Her thread used to have the Sofie name in it but someone removed it from the title... maybe a mod could add it back in?
I'd love to see the whole of that set from 18eighteen as they often have more pics than the original site (club17 in this case) and they're also often HUGE!