American Idol star Jax reveals she has thyroid cancer in Facebook post 

American Idol Star Jax has revealed she has Thyroid cancer.

In a lengthy Facebook post, the 20-year-old told her fans doctors had discovered 18 tumours in her throat — 12 of them cancerous.

The singer shared a deliberately upbeat message, joking about the condition, praising her doctors, and vowing to run the charity marathon she had already signed up for.

The season 14 third place finisher star – whose real name is Jaclyn Cole Miskanic -experienced a drop in energy, fluctuating moods and started losing her voice.

‘The work, pressure, and travel in music is not always so forgiving on the mind and heart,’ she wrote. ‘Sometimes I think the universe is yelling at me to slow down and I just blatantly ignore it.’

But after finding a small lump on her throat, she decided to have it checked out — even playing a gig while she waited on her biopsy results.

Malignant: In a lengthy Facebook post , the 20-year-old told her fans doctors had discovered 18 tumours in her throat — 12 of them cancerous (pictured performing on Idol in July last year)

‘My Thyroid needed to be surgically removed fully immediately and let me tell ya…I’ve had some serious chill time to binge watch Game of Thrones and Orange is The New Black these days,’ she said.

‘After they took out my Thyroid, I have been undergoing radiation treatment in NY. Yes. I’m basically a radioactive spider. 

‘When you’re 20 years old, you have this Superman entitlement mentality. Like you’re indestructible…And sometimes all it takes is God telling you it’s time to take a break for you to understand that you are most certainly not.’

Upbeat: But instead of being glum, the singer shared an incredibly upbeat message, joking about the condition, praising her doctors, and vowing to run the charity marathon she had already signed up for

Jax revealed that she initially didn’t even want to tell people about her diagnosis, but her family convinced her to explain her absence to her fans. 

‘Things could always be worse. I always feel kind of awkward about complaining or showing any emotion about serious things…I guess that’s where my age really shows,’ she continued.

The first thing I did when I found out about the cancer was crack a joke. My little bro knows me best…The second they wheeled me out of surgery he says, “Man! I tried to warn you the music business was cut-throat…”

‘I’m a tough-guy, but I don’t think I have ever experienced anything scarier,’ she admitted.

She finished her post by vowing to run in the NY Marathon in November for the 9/11 survivors charity Tuesday’s Children, which is close to her heart as her fireman father was a first responder following the terror attacks.

Ass kicker: She finished her post by vowing to run in the NY Marathon in November for the 9/11 survivors charity Tuesday’s Children, which is close to her heart as her fireman father was a first responder following the terror attacks