Girl group Girls' Generation (SNSD)'s Jessica and group f(x)'s Krystal revealed a sister photo, showing off their beauty.

Yesterday, Krystal posted on her Instagram, "Can't deny we look alike," along with a picture.

In the picture, Jessica and Krystal with curled hair are shown. The two are making a similar facial expression, where they look almost like twins because they look so alike.

Internet users who saw this commented, "I can't say which one is prettier", "Their parents are so lucky" and "I wish I lived next to them."

Photo Credit: Krystal Instagram