Avery Lynn Canahuati, the little 5-month-old with the "bucket list" of things to do before she died, passed away suddenly Monday afternoon, her parents have announced.

Michael Canahuati confirmed on Avery's blog Tuesday that his daughter passed away at their home in Houston, Texas on Monday after one of her lungs collapsed and she went into cardiac arrest. He said he performed CPR and brought Avery back for a brief time, but she died shortly after arriving at the hospital.

Avery was born with a genetic disorder called Spinal Muscular Atrophy Type One, an incurable disease that slowly attacked her muscles. She had lost the ability to move her legs, and doctors told the family she likely wouldn't live past age two.

While the family was aware their daughter's prognosis was grim, her father says they thought they would have more time.

"Avery's passing this quickly came as a complete shock to all of us, as she had just been given a thumbs-up at her last doctor's appointment only three days ago," Michael wrote on the blog.

"While we were aware of the severity of her diagnosis, we never lost hope for Avery and even in her passing, we still have hope for our daughter and all of her friends."

He then included a letter that he said that Avery "gave" him to post when she passed on.

"Dear Mommy & Daddy," the post reads, "If you're reading this it's because I've gone to take care of my Uncle Bryant, Nana Carolyn, Papa George, and all my great Grandparents.

"…When I started writing my blog, I thought I'd only be speaking to my closest friends and family members. Little did I know soooooooo many people would care about me and while I'm flattered to have so many people who love me, I hope they will also take time to love and care about all of my friends out there with SMA.

"…Mommy. Daddy. I love you every bit as much as you love me. And while I'm not here physically, I will forever live in your minds, as you will mine."

Avery's blog, written in her voice drew more than 2 million views and included a list of all the things that she would want to do before she died.

She was able to cross off a number of the items, including celebrating her first Easter, getting her first kiss (from a boy named Cooper, who has another form of SMA), having her first tea party with her mom and throwing out the first pitch at a baseball game.

Her parents said they hoped her story would help raise awareness of SMA and about the need for research into ways to treat and prevent genetic illnesses.

Avery's final post ends with a request to those who would like to offer condolences to do so by donating to help fund an experimental SMA gene therapy, and to the non-profit organization, Fight SMA.