Demi Lovato has penned a heartfelt tribute to her great-grandmother, who passed away over the Memorial Day weekend.

In an emotionally charged Instagram post, the ‘Heart Attack’ star describes the deep connection she has had with her ‘Mimaw’, despite a 70-year age difference.

“This morning I lost my world and the world’s most special woman” Demi Lovato starts.

“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.. She held on when she lost the love of her life.. The one she was married to for 53 years. She smiled even though she lost a son just this year. She told everyone she loved them every single chance she got and she joked even when her strokes left her unable to speak properly. The smile that she had not only could light up a whole room but it most definitely lit up the entire nursing home. 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 a part. The pain I feel is almost unbearable.”

“Mimaw, I hope you are with Papa now,” she wrote. “I hate that I can’t hear your voice but I love that you are no longer in pain. I love you so much and I miss you more than anyone could ever imagine. I’ll miss your smile, your wittiness, painting your nails and your kisses.”

She also posted a beautiful photo collage, this time with with no caption, because these pictures really are worth a thousand words.

Rest in peace, dear Mimaw.