Earlier today, Selena Gomez took to Instagram to share the reason why she hasn't been promoting her new music. Fans were surprised to hear that the singer had to go through a life-saving operation in order to get her health back.

Gomez, who has talked about her Lupus diagnosis before, found out this summer that because of her illness she was in need of a Kidney Transplant. The pop star went on to share that she's currently in recovery from the surgery and that her best friend, Francia Rasia, was her organ donor.

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Kidney transplant

CNN reports that in 2015 Selena shared that she was suffering from the autoimmune disease called Lupus. At the time she told Billboard that she needed to go through chemotherapy after she received her diagnosis.

Gomez also shared that she was at risk of having a stroke and that she was displaying symptoms of anxiety and depression, which is why she decided to take a break in order to maintain her health.

Now, two years later after that initial interview, the singer found herself in need of a kidney transplant. She started off her Instagram post by saying that her fans were the first to notice her absence from the media, and then she continued by explaining her reasons for this.

"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.", she wrote.

In the post, she shared a picture of her resting in a hospital bed next to her best friend, Francia Raisa, who was her donor during the transplant.

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She expressed a lot of gratitude for her friend's gesture, calling Raisa beautiful, noting how big her sacrifice was and telling her how much she loves her.

The 25-year old star also thanked her family and her doctors for their help and attention before and after the surgery. To her fans, she explained that she looks forward to sharing what she has been through these past few months, but that it could be a while before she does, after all, she must focus on her recovery at the moment.

A beautiful gift

According to Just Jared Jr., Francia also talked about the transplant on her Instagram page. Raise wrote that she's thankful for having the chance to be there for her friend. She explains that this experience not only helped her save someone's life but that it also changed hers.

Like Gomez, she went on to say that the story of what they went through will be shared in due time. Both women ended their posts by sharing the web page of the Lupus Research Alliance and encouraging fans to read more on this disease.