While Demi Lovato seeks help in a treatment center, her little sister Madison De La Garza has been hard at work thinking of the perfect holiday gift for Demi. "Hey guys! I am making a Christmas present for Demi," Madison Tweeted. "Please send me your messages for Demi. I am making a book of them for her! Thank you!"

READ IT: Demi Lovato is making "tremendous progress"

The eight-year-old Desperate Housewives actress went on to give detailed instructions to fans. "Tweet the messages to me [@Maddieloveyou1]. I will write it and your username so she will know who it is from. Again, it means a lot! I love you guys," she Tweeted. "You can send me any pictures that you want to, like of you holding a sign with messages of support or the Demi Lovato heart on your wrist."

Demi has not spoken publicly since it was announced that she checked into a treatment center on November 1 for "emotional and physical issues." But Madison has been to visit her sister as she recovers, and a recent statement from a spokesperson for Demi says the star is "doing very well at this moment."

Will you send Madison a message for Demi? What would you write or take a pic of?

Photo: Anthony Randell/Disney Channel

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