f(x)'s Krystal showed off her and Victoria's morning beauty.

Simply saying "good morning", Krystal posted the photo to her me2day account. Together with fellow f(x) member Victoria and a plush bear doll, the two girl group members are comfortably posing in everyday clothes, with their makeup-free faces thrown into sharp relief.

"They're not even dressed up, but they're so pretty," exclaimed a fan. "It should be illegal to be so beautiful with their bare faces."

Meanwhile, together with their fellow SMTOWN members, f(x) recently pulled off a successful concert in Singapore.