Yoona was the first ever Idol to endorse a big cosmetics company with Innisfree.
She loves to eat midnight snacks so much that she was considered as SNSD's queen of Midnight Snacking.
Yoona loves to eat cereal before going to bed.
Yoona is nicknamed Him Yoona because of her strength.
She dated her fanboy, the actor, TV Host, singer & model Lee Seung-gi from September 2013 through August 2015.
According to the members, Yoona is the dishwasher of the group.
She is part of Girl's Generations Dance Trio along with Hyoyeon and Yuri.
She can imitate to perfection gag woman Anh Yongmi
Taunts Jessica with cucumbers whenever she can.
Yoona makes Hyoyeon listen to her until the wee hours of the morning.