BluGiRL Yoona
On 131021 (October 21, 2013), SNSD's Jessica, Yoona and Seohyun were present at GiRL Thanks Party in Thailand. As you probably knew, GiRL was a perfume launched with SNSD as faces. The ads banked a lot on the innocence/pure image of the girls.
That aside, at the event Yoona was wearing the Blumarine Embroidered Sleeveless dress which you can buy here.