Sadie Robertson Needs Your Prayers, You Wont Believe What Just Happened Sadie Robertson of Duck Dynasty has become a role model for teenage girls throughout the country. While other stars her age are busy promoting sexuality, Sadie has stuck to her Christian values and volunteer work. This week, Sadie called for her social media followers to storm the gates of heaven with prayers for a little girl named Katie Joyce. Katie is currently suffering from a brain tumor. This is Katie Joyce, Sadie wrote on her Instagram. Her family found out she has a brain tumor and its on her brain stem. The doctors say we need a miracle. The only thing that can fix this is if we storm the gates of heaven. I will pray for all of you as well. The post has already gone viral, receiving more than 150,000 likes. 