f(x) Amber, Subway Billboard Present From Fans "Thank You"

f(x)'s member Amber thanked her fans for a special birthday present.

On September 23, Amber posted on her Twitter, "Amber... can I get a picture with you? Everyone thank you so much" along with a picture.

In the picture, Amber is touching her own face on the billboard of a subway station. Her fans had put "Amber, Happy Birthday! We'll always be supporting you" in celebration of her birthday.

Internet users who saw this commented, "Amber is so cute," "Her fans are crazy," and "Happy birthday, Amber."