On the June 25th episode of KBS2 "Hello," singer Lena Park and f(x) members made their guest appearances on the show to discuss their concerns.

Krystal, who usually has a very cool and collected image, surprised her fans with her cute face expressions. While listening to the concerns of people on the show, she would make surprised face expressions or stick out her tongue to the side. Because of her usually collected image, this cute side of her is garnering much attention.

Surprised viewers commented, "It's nice seeing a brighter Krystal on TV," "Her expression when she sticks out her tongue is so cute," and "This girl is charming." 

Photo Credit: KBS