Her friend, actress Francia Raisa, was the donor.
The "Bad Liar" singer has no doubt that Raisa's courageous, selfless act saved her life.
'My kidneys were just done.
In Twitter post of a teaser from the interview, Gomez reveals her kidneys were completely "done". "And she volunteered and did it".
She continued, "I honestly look forward to sharing with you, soon my journey through these past several months as I have always wanted to do with you".
In her first interview since the transplant, the 25-year-old recalled to NBC News the hard decision she faced after doctors noticed her kidneys were failing.
Milpitas police to collect unwanted prescription drugs this Saturday
Medicines that languish in home cabinets are highly susceptible to diversion, misuse and abuse. Cuyahoga County now has more than 40 Rx Drug Drop Boxes located at law enforcement agencies.
Selena Gomez shares pictures from her kidney transplant on September 14, 2017.
"I guess I got to the point where it was really kind of life or death", says Gomez.
'So I found out I had to get a kidney transplant due to my Lupus and was recuperating. "It was what I needed to do for my overall health".
The transplant, which occurred because of complications Gomez was having with lupus, was a fearless and selfless act by Raisa. I am incredibly blessed.
Her statement activated a wave of contributions to The Lupus Research Alliance: $500,000 was gathered in acknowledgment to it, the highest amount it has ever gotten.
She wrote at the time: "I am beyond grateful that God would trust me with something that not only saved a life, but changed mine in the process". After Selena had shared part of her story on Instagram, Francia shared part of hers.