Jessica Today i would like to write about our only Ice Princess, Jessica Jung ^^
1.First of all is the link... They still look a like even not that much because in my opinion most of the siblings will have the quite similar face < maybe in structure of features >, but i have to admit that Krystal looks a like Yoona more.
2.This one is the hottest look alike link They look similar especially when they have the same pose o hairstyles. For me, it is maybe because of they face structures and some of the features like lips <very similar~small lips>...