f(x)'s Krystal shared an adorable photo from her childhood on her 18th birthday (Korean age: 19).

Krystal posted to me2day on October 24: "Thank you to everyone who wished me a happy birthday. Though everyone's saying I'm turning 20, I was 17 just yesterday. Let's just say that I'll stop here."

Fans commented, "Krystal has always been beautiful. Natural beauty", "So cute", and "It seems like she stopped aging since then".

In related news, fellow member Amber also wished Krystal a happy birthday with a unique post.

Happy Birthday, Krystal!