On September 20th, f(x)'s Amber posted a message of gratitude to fans on her me2day, saying�"To all those who wished me a Happy Birthday, thank you so, so much!". She added, "I think this year's birthday was the best birthday ever^^ To those who spent my birthday with me and to the world's best fans, I will never forget thistime with everyone". Amber shared two pictures of her f(x) family celebrating her birthday (minus Krystal who was probably filming for 'High Kick 3'.�Victoria, Sulli, and Luna are seen surrounding Amber as they laugh and hold up 'V' signs. The girls also posed with Amber's birthday cake in a room full of with cheery decorations. Fans commented, "I'm late, but Happy Happy Happy Happy x100 Birthday", "Waiting for your comeback. You're becoming prettier and prettier", and "Glad you had a happy birthday". Amber turned 19 (or in her Korean age, 20 years old) on September 18th. Source + Image: Naver and me2day