YoonA rose to fame for her sweet, girl-next-door image, but she's a woman now - and a sophisticated one at that, as you can see in her 'Marie Claire' shoot!

Dressed elegantly in dresses that drape against her slim body and mature attire, she looks elegant yet still as innocent and pure as ever.  Her sweet gazes and her lovely features show off her everlasting beauty!

Check her out in the new 'Marie Claire' issue!