Demi Lovato Thanks Fans for 'Love & Support' After Death of Her Dog Buddy

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Demi Lovato and her dog Buddy visit "Extra" at Universal Studios Hollywood on March 3, 2015 in Universal City, California. 

It's been a tough week for Demi Lovato and boyfriend Wilmer Valderrama, who lost their dog Buddy this past Sunday to a coyote attack.

Demi Lovato 'Hearbroken' Over Death of Her Dog Buddy

On Friday (July 31), Lovato shared a sweet message to her supportive fans over Instagram. During what she calls "the most painful week of [her] life," Lovato expresses gratitude to those whose well-wishes have helped the couple cope.