How Nick Jonas Learned of Selena Gomez's Kidney Transplant

"The strength she's shown through all that is amazing and inspiring," the singer told SiriusXM.

Nick Jonas says he is inspired by his old friend Selena Gomez following her recent kidney transplant, saying he had no idea about the surgery until she announced it to her fans.

"I was just as surprised as everyone else when I woke up and saw her Instagram," the "Jealous" singer told SiriusXM's Hits 1 during an interview on Friday.

"Wow, just incredible — and the strength she's shown through all that is amazing and inspiring."

"I'm pumped for her," he continued. "I'm happy to see that she’s doing well, it seems, and that she was able to get the surgery. And her friend helping her is a beautiful thing. It's all amazing."

Gomez surprised her supporters with the announcement on Thursday, revealing that complications from chronic autoimmune disease lupus forced her to lay low and put off publicly promoting her new singles "Bad Liar" and "Fetish" until she recovers.

"There aren’t words to describe how I can possibly thank my beautiful friend Francia Raisa," she wrote. "She gave me the ultimate gift and sacrifice by donating her kidney to me. I am incredibly blessed. I love you so much sis."

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. And finally, there aren’t words to describe how I can possibly thank my beautiful friend Francia Raisa. She gave me the ultimate gift and sacrifice by donating her kidney to me. I am incredibly blessed. I love you so much sis. Lupus continues to be very misunderstood but progress is being made. For more information regarding Lupus please go to the Lupus Research Alliance website: www.lupusresearch.org/ -by grace through faith

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Jonas and Gomez say they had a "puppy love" relationship in 2008 when they were both Disney Channel stars. They have remained good friends since then, occasionally sparking new dating rumors -- but it was Gomez's current boyfriend The Weeknd who was at her side during the medical emergency, scheduling his performances around her operation so he could be with her, according to PEOPLE. "It was a super serious operation," a source told PEOPLE, "and all her friends were worried." view photos Getty Tiffany Trump Sits Front Row and More Must-See NYFW Celebrity Sightings

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