Nightbirde, born Jane Marczewski, shared an inspirational message on Instagram.
The AGT star shared a black and white photo of herself in her post.
The music star - who previously revealed that she weighed about 85 pounds - appeared to be sitting down and had her arms wrapped around herself.
She captioned her post: "We are breaking records every second we survive."
The singer concluded: "How rare a miracle it is to even be alive."
Last month, the performer went on CNN to give an update on her cancer battle.
While speaking to host Chris Cuomo - who was recently suspended by CNN - Nightbirde revealed her latest diagnosis and opened up about the "pain of giving up."
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."
When Chris mentioned if she felt "comfortable to dream," Nightbirde opened up: "I think life sometimes is a game of 'choose your pain' so the pain of continuing or the pain of giving up.
"So, the pain of continuing there is a lot more uncertainty that way, but I think the pain of giving up is so much worse."
Back in August, the TV personality announced her exit from the AGT finals on Instagram because her health had been deteriorating.
While reflecting on her experience on the talent competition show, she said: "It's so hard for me to not be on the @agt stage for the finals this week.
"I bet you never saw someone win so hard and lose so hard at the same time. This isn't how the story was supposed to go."
The songwriter became an overnight sensation after her incredible audition performance had racked up over 30 million views on YouTube.