YoonA recently revealed to her fans what she did on her birthday through the video. In the video titled "What I did for my Birthday" that was posted this day, Yoona went around to look at the neon signs that fans had prepared for her at the subway stations.
YoonA revealed that she was recording the Vlog for her fans because her fans love watching these types of videos. She also spent the time experiencing the birthday event that her fans had prepared for her.
She explained that she has been visiting different events that fans had prepared for her whenever she had time. She explained that she wanted to visit each one so that all her fans will be happy and wanted to make sure there isn't a fan who would be sad because she didn't get to visit their event. Therefore, YoonA revealed that she has been visiting them in secret whenever she has time.