Demi Lovato mourns grandfather with touching post: 'I love you, Grandpa'

Demi Lovato mourns grandfather with touching post: 'I love you, Grandpa'

Demi Lovato is mourning her late grandfather in an emotional tribute she shared Wednesday on Instagram. In 2016, Lovato publicly grieved the loss of her 93-year-old great-grandmother, "Mimaw," whom she called "the world's most special woman."