Kim Hyo-yeon Biography K Pop - Girls Generation | Hyoyeon SNSD Girls Generation - SM Town | Gim Hyo-yeon | Kim Hyoyŏn on September 18, 2012 Celebrities Biography Entertainment Girls Generations K Pop Kim Hyo-yeon Biography K Pop - Girls Generation | Hyoyeon SNSD Girls Generation - SM Town | Gim Hyo-yeon | Kim Hyoyŏn +