AceShowbiz -

Having tough times after the death of her beloved dog Buddy, Demi Lovato managed to express her gratitude to fans for their outpouring supports. The "Cool for the Summer" songstress posted a photo collage on her Instagram on Friday, July 31 featuring nine pictures of her and Buddy.

In companion with the image, Demi wrote, "We can't thank you all enough. This has been the most painful week of my life but because Wilmer and I had so much love and support, I've been able to stay strong and will continue to get through this difficult time." The 22-year-old star continued, "The out pour of love and support has been unbelievable and it means the world to us. Love you all tons and ton..."

We can't thank you all enough. This has been the most painful week of my life but because Wilmer and I had so much love and support, I've been able to stay strong and will continue to get through this difficult time. The out pour of love and support has been unbelievable and it means the world to us. Love you all tons and ton...

A photo posted by Demi Lovato (@ddlovato) on Jul 31, 2015 at 11:46am PDT

In line with Demi, her boyfriend Wilmer Valderrama took to Twitter to thank fans for their kindness in the wake of their loss. "Thank u all sweet people that've showed @ddlovato & me support & love during this time & for loving our little guy (@DemisBuddy) We love u," he tweeted on Thursday, July 30.

Thank u all sweet people that've showed @ddlovato & me support & love during this time & for loving our little guy (@DemisBuddy) We love u 😔

— Wilmer Valderrama (@WValderrama) July 31, 2015