(Radio.com) Demi Lovato has shared an emotional tribute to her great-grandmother, who passed away earlier this week. In addition to posting a touching photo of the two of them together, Lovato described her grief and gratitude in a lengthy caption.

"This morning I lost my world and the world's most special woman," she wrote. "I miss her more than words can even describe. There is an emptiness in my heart that only her spirit can fill and I pray that I will feel her by my side every single day until we meet again. I attribute my strength to her."

Despite the difference of decades and generations, the two shared a tight relationship and Lovato said she was empowered by her great-grandmother. "She was my great-grandmother but we were so close that I never knew it was possible that anyone could have the bond that we shared even 70 years apart," Demi said. "The pain I feel is almost unbearable but because of her strength I will power through it." Read more here.

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