VIDEO : Demi Lovato and Wilmer Valderrama's Mourn the Death of Dog Spawn

Demi Lovato and Wilmer Valderrama's dog Spawn has died. Late Sunday night, Lovato announced on Instagram that their beloved dog Spawn died Saturday and wrote, "I miss you so much already beautiful boy. When I first met you 6 years ago, I was intimidated by your size and your strong presence.. But as I got to know you, I learned you were just one big teddy bear." This is the second dog the celebrity couple have had to grieve, the first one being Buddy, who was killed by coyotes in July.