Our lovely Krystal is celebrating her 20th birthday today and her sister Jessica and fellow f(x) member Amber sent her their warm and cute birthday greetings.

On October 24, Jessica posted on her Weibo account, “Baby Krys’ 20th bday!! Thank you mom she is the most precious and lovely girl on earth..”, and attached a set of their adorable photos, showing off their sisterly love.

Amber also sent out her birthday greetings through a cute and funny clip on her Instagram with a short and sweet message, “HAPPY PRINCESS DAY!” The video features some of adorable and goofy moments of Krystal and Amber.