Yoona of popular K-pop girl group Girls’ Generation uploaded a picture on her official Instagram account on Sunday.In the image, all the group’s members are in black-sequined uniforms with big grins on their faces. The group held its concert “Girls’ Generation 4th Tour - Phantagia” on Saturday and Sunday at the Taipei Arena.Its latest album “Lion Heart” was released in August last year.By Kim Soo-hyang ()