Want to wish Amber (September 18) and Krystal (October 24) of f(x) a happy birthday? Our friends at the Aff(x)tion Forums have setup an awesome idea so that YOU can send the ladies a personal birthday message. The first 400 messages for Amber and Krystal will be placed in a special book that will be sent to Korea! That's right only 400 messages for Amber and 400 messages for Krystal will be placed in books for their birthdays. Don't worry if you're not one of the lucky 400, because we have a hunch *wink wink* that both members will see the rest of the messages on the Aff(x)tion fansite. Now since Amber's birthday is only days away the Aff(x)tion team will be taking the first 400 messages for each member at a first come first serve basis. So don't stall and get over to the Aff(x)tion Forums and register so you can send your personal message! Birthday messages for Krystal: Krystal's Birthday Book Birthday messages for Amber: Amber's Birthday Book Now this is only part one of the Amber & Krystal Birthday Project and we'll be announcing more on part two of the project soon here @ allkpop! For more information on the projects at Aff(x)tion check out the Forum Projects section in the Aff(x)tion Forums!