Rainbow's Jisook thanked her fans for all the birthday wishes she received. On the 18th, she tweeted, "Thank you to everyone that wished me a happy birthday. Especially my members who threw me a surprise party at 12AM!! I love you and I love you again. I will keep becoming the ever growing Sook-ee. Thank you" In the photo that came along with the photo, Jisook showed off her blond hair and no-makeup fresh face. She even added cat whiskers to make the photo more adorable. Fans wrote, "You're lucky to have so many members~", "Happy birthday once again!", "I hope you keep improving and growing.." Jisook was born in 1990 on July 18th so this is her 22nd birthday, in Korean age. Source: Money Today via Nate