Demi Lovato is mourning the loss of another family member with her uncle's death.

The Cool for the Summer star had a difficult 2015 following the passing of various family members, pets and friends, and she took to on Monday (25Jan16) to reveal the death of yet another loved one.

Lovato shared a photo of her Uncle Jeff wearing a T-shirt promoting The X Factor, the U.S. TV talent show on which she served as a judge in 2012, along with a caption that reads: "This will always be my favorite picture of my Uncle Jeff. Not only because he's wearing an elf hat and an X factor shirt on Christmas Day a few years ago, but because he looks happy and healthy. We are so grateful you're at peace now.

"Take care of Uncle Billy and Papa while you're up there. We love you and miss you already.. #RIP"

Last year (15), Lovato said goodbye to her great-grandfather, her Uncle Billy, friend and singer Chris Carney and two dogs, Spawn and Buddy.

Before America's Thanksgiving holiday took place in November (15), Lovato shared an inspirational message with fans, noting the words helped her get through the pain of dealing with so much loss.

"Hey little fighter, soon things will be brighter," the Instagram post read, while the star added in the caption, "When life hands you one too many curve balls.. Remember, #staystrong."