Demi Lovato is still processing the death of her beloved dog Buddy and thus has cancelled an upcoming promotional TV appearance while she mourns his passing. The "Cool for the Summer" singer was supposed to be appearing on Good Morning America tomorrow.

Lovato's dog died on Sunday during a tragic accident. As previously reported, she shared the news via social media through an extended post on Twitter. Lovato explained what happened to the dog that she shared with boyfriend Wilmer Valderrama. "He was taken from us way too soon in a tragic accident and though I will never know why this had to happen."

Early reports indicate that Lovato's dog might have been attacked by a coyote, TMZ reported.

Image Courtesy of Dara Kushner/INFphoto.com

The singer has asked everyone to respect her privacy as she goes through this emotional time. Many fans have shared their sympathies and condolences on social media.

Buddy had been given to Lovato by Valderrama as a Christmas present last year.

Image Courtesy of Twitter, @ddlovato