(CNN)Juniper and Violet are best friends who are both battling the same rare form of cancer. 

They also shared a dream to visit "the happiest place on Earth" -- Disneyland. 

Violet's wish came true in December 2013, thanks to Make-A-Wish Foundation. When the nonprofit group granted 3-year-old Juniper's wish in October, they offered Violet the chance to share the news to her beloved friend. 

Violet, now 4, jumped at the idea, appearing in a heartwarming video posted on YouTube. The video has been viewed more than 100,000 times since being posted on Thursday, and it's drawing unusually positive comments for the video platform, which is notorious for its anonymous, at-times snarky commenters. 

Dressed in the same glittering Cinderella costume she wore on her own Make-A-Wish trip, Violet twirls around her bedroom, bubbling with excitement. 

"You're going to Disneyland!" she squeals. 

Danielle Ouellette, Juniper's mother, says her daughter cheered when she saw the video. 

"She was super excited to see Violet and she knows what Disneyland is, so she got really excited," she said. 

The girls met in November 2013 and became treatment buddies at Seattle Children's Hospital while battling retinoblastoma, a cancer that forms in the eye's retina. Violet lives in Gig Harbor, Washington, and Juniper lives in Everett. 

The girls formed an instant bond when they first met, Violet's mother, Shenay Spataro, said. 

Hospital staffers became accustomed to seeing the girls playing together, Spataro said. 

"They just hugged each other for so long. Danielle [Juniper's mother] and I were both in tears," she said. 
Where?
Seattle Children's Hospital