The 25-year-old made the revelation in a heartfelt Instagram post where she praised Francia Raisa for ‘the ultimate gift’.
Alongside the message, she shared a picture of herself and Ms Raisa laying side-by-side in hospital clutching hands.
In a lengthy emotional post, she explained why she had been absent for most of the summer as she shared a series of pictures of her scars.
Lupus is a chronic autoimmune disease with symptoms including body aches, fevers and extreme fatigue – it can also lead to kidney and heart damage.
She wrote: “I’m very aware some of my fans had noticed I was laying low for part of the summer and questioning why I wasn’t promoting my new music, which I was extremely proud of. So I found out I needed to get a kidney transplant due to my Lupus and was recovering.“It was what I needed to do for my overall health. 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. Until then I want to publicly thank my family and incredible team of doctors for everything they have done for me prior to and post-surgery.”
Selena, who is dating The Weekend, went on thank her Francia who had donated her kidney, saying she felt ‘incredibly blessed’. Selena and Francia have been friends for many years.