Krystal Jung turns 19 years old today and she’s a member of F(x)! Now, she’s also the younger sister of Jessica from SNSD, but I hate the fact that I have to tie this fact in when it’s Krystal’s birthday. But there’s a lot of SNSD fans out there and some may get a little rowdy and Lord knows that I don’t like rowdy. Though, she doesn’t really look like Jessica. In this picture, she looks more like Yoona, but that’s just my opinion.