Im Yoon-ah (Hangul: 임윤아; born May 30, 1990), best known by her stage name Yoona, is a South Korean singer and actress. She is a lead dancer, sub-rapper, sub-vocal, and the visual in K-pop girl group, Girls' Generation, as well as a member of Girls' Generation second subunit Oh!GG, which went on to become one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide.…