On the 10th, Sooyoung shared several photos and videos on her Instagram, accompanied by emojis of two horses, a heart, and the number 100.
The posts revealed Sooyoung enjoying her birthday. Notably, she was joined by some of her Girls' Generation bandmates, including Tiffany, Yuri, Yoona, and Seohyun. At home, she celebrated with her older sister, Choi Soo-jin.
Meanwhile, Sooyoung has been in a public relationship with actor Jung Kyung-ho for 14 years.
By Da-yeon Jeong, TenAsia Reporter light@tenasia.co.kr