Demi Lovato's Great-Grandfather Passes Away: See Her Touching Tribute

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Demi Lovato attends the 2015 MTV Video Music Awards at Microsoft Theater on August 30, 2015 in Los Angeles, California. 

Demi Lovato's great-grandfather (who she calls Papa), who has been ailing all summer, died this week at age 88. Lovato announced his passing on Instagram yesterday (Sept. 28) via a photo of both her great-grandfather and her dog Buddy, who died earlier this summer in a coyote attack.

Demi Lovato 'Heartbroken' Over Death of Her Dog Buddy

“My two favorite Buddy’s are now playing in Heaven,” she said in the caption. “My heart is absolutely broken and I can’t even begin to imagine a world without my Papa but I know one day we’ll meet again and that’s what keeps me going."

 He is survived by her great-grandmother "Mimaw," who is 93.