Delaney is a 13 year old from Denver in Colorado who has been battling Neuroblastoma - a solid tissue tumour that begins on the adrenal gland and is usually found in infants and toddlers.
On the 8th of December Delaney’s mom Wendy Campbell posted on the "Delaney Donates" Facebook page “Tomorrow we will begin a 5 day treatment of radiation to help relieve some of the pressure of the tumour off her brain then we will go home and begin hospice care.
Soon thereafter, Grand Junction radio station Mix 104.3 made a call to action to grant the girl her wish to meet with Taylor Swift.
Within days the young patient amassed a huge following after sharing the #DelaneyMeetTaylor hashtag on social media in the hopes of catching the Shake it off stars attention.
Tay Tay decided to surprise Delaney with a home visit on this past Saturday.
Wendy responded: "This was a very difficult and heartbreaking decision for Delaney and our family. At this time we are dealing with many questions we are struggling to answer. We are so blessed to be surrounded with so many wonderful people who love and care for us and forever grateful for all the support we have received over the past five years.
Our goal now is to keep Delaney as comfortable as possible and keep her spirits uplifted as she travels on a journey we fought so hard to avoid.”
So happy for my baby girl," Wendy wrote on Facebook, "Thank you Taylor Swift for the best Christmas present ever."
The Facebook post:
'I want to meet Taylor Swift before i go deaf'
Taylor Swift's mother diagnosed with cancer
Taylor Swift sings with leukaemia patient in hospital