f(x)'s Amber gave fans a good laugh with her surprise Charmander cosplay!

Amber shared the above photo of herself in the Pokemon costume on Twitter on September 18. It seems the f(x) member wanted to treat fans to a surprise on her 22nd birthday (international age). 

Fans commented, "A surprise photo for your birthday," "Perfect cosplay with the addition of the flaming tail," "Where did you get this? So cute," and more.

In other news, Amber is currently hosting KBS 2TV's 'Global Request Show - A Song For You Season 3'.

Happy Birthday, Amber!