America's Got Talent singer Jane Marczewski has died at 31 after a long battle with cancer.
The singer - who performed under the stage name Nightbirde - had months of treatment before the cancer spread to her lungs, spine and liver.
The show's host Terry Crews confirmed the tragedy, writing on Instagram : "We are saddened to learn about @_nightbirde's Passing. Our Condolences goes to her Closest Family & Friends in such of This difficult time. We Love you, Nightbirde"
And judge Howie Mandel tweeted: "@_nightbirde was such a bright inspirational light in all our lives. We must continue to live and learn from her words and lyrics. As much as I feel horribly about her passing I feel lucky to to have met, heard and known her."
She became an overnight success when she performed her song 'It's OK' on AMT and got the Golden Buzzer from Simon Cowell.
A video of her singing the song on the show's 16th season got over 30million views on YouTube.
Her death has come as a shock to fans after the singer said it as a "miracle" to "even be alive" last December.
Sharing a black and white photo of herself, she wrote: "We are breaking records every second we survive.
"How rare a miracle it is to even be alive."
Nightbirde stepped down from the AGT finals last August after her cancer had taken a "turn for the worse".
"Sharing my heart with the world on AGT has been an honour and a dream come true. My point of view this summer has been astounding," she said in a statement.
"What a miracle that the pain I’ve walked through can be reworked into beauty that makes people all over the world open their eyes wider."
She continued: "Since my audition, my health has taken a turn for the worse and the fight with cancer is demanding all of my energy and attention.
"I am so sad to announce that I won’t be able to continue forward on this season of AGT. Life doesn’t always give breaks to those that deserve it—but we knew that already.
"Thank you for all your support, it means the world to me. Stay with me, I’ll be better soon. I’m planning my future, not my legacy. Pretty beat up, but I’ve still got dreams."
In November, Nightbirde gave fans an update on her cancer battle during an appearance on CNN.
She said: "I did get a scan result back and a bunch of stuff that was there has now disappeared, and a bunch of the really big stuff has gone down in size. We're on the way.
"It's a lot to process the highest highs and the lowest lows of my life all happening at the same time, and all of this playing out in front of millions of people is really - it's a lot to carry.
"But it's also such an honor because the whole world is carrying their own weight, and we get to learn how to do this together."
