Watch Live:
Storm Damage, Injuries Reported at Virginia Beach

Fiona Apple Postpones Tour for Dying Dog
PHOTO: Fiona Apple performs at Fillmore Miami Beach on September 30, 2012 in Miami Beach, Florida.

Credit: Larry Marano/Getty Images.

Fiona Apple is putting her tour on hold in the name of her dog. In a message posted on Facebook Wednesday, the singer said her dog Janet, a pit bull once used in a dog fighting ring that she found as a puppy in Los Angeles' Echo Park , is dying. Janet suffers from Addison's disease and has a tumor in her chest.

"I just can't leave her now, please understand," Apple wrote in the post, which was accompanied by photos of a handwritten note she penned before typing out her message on Facebook. "If I go away again, I'm afraid she'll die and I won't have the honor of singing her to sleep, of escorting her out."

Apple recently wrapped the North American leg of her tour for her latest album, "The Idler Wheel." She was due to perform in Brazil next week, then travel to Argentina and Mexico.

PHOTOS: Celebrity Pet Lovers

Apple detailed her close relationship with Janet. "She's my best friend and my mother and my daughter, my benefactor, and she's the one who taught me what love is," she wrote. She revealed that she bakes tilapia for the dog, and they sleep in the same bed every night.

In Apple's eyes, she's better than a boyfriend. "Janet has been the most consistent relationship of my adult life, and that is just a fact," she said.

Thousands of people have posted messages of support on Apple's Facebook page. She's come to terms with the fact that she's witnessing what will likely be Janet's last days.

"I know that she's not sad about aging or dying," she wrote. "But I know that she is coming close to point where she will stop being a dog, and instead, be part of everything. She'll be in the wind, and in the soil, and the snow, and in me, wherever I go."

More ABC News