"I don't wanna say it because I don't want it to be real… But my precious baby Floyd has passed away," she wrote. "I am broken."
Miley introduced fans to the adorable Alaskan Klee Kai in 2011, writing on Twitter, "I'm so in love with him it is ridiculous."
It's the second time in two years that Miley has lost a pet. Back in December 2012, she revealed that her Yorkie mix puppy Lila has passed away. The singer, 21, has four other rescue dogs, Ziggy, Happy, Marry Jane and Penny Lane.
Miley isn't the only celebrity animal lover. From the Obamas to Hugh Jackman and Karl Lagerfeld, stars can't help but share pictures of their four-legged friends on social media.
With Taylor Swift declaring herself a "cat lady" when she posted the first photo of her cat Meredith, and designer Karl admitting he has two dedicated maids for his pampered feline Choupette, HELLO! Online takes a look at celebrities and their beloved pets…
Click on the image below for the full gallery