Watch: Sarah Harding releases solo fundraising single amid cancer battle
Sarah Harding has released a never-before-heard song she recorded a decade ago.
It comes as the former Girls Aloud star is battling breast cancer, which she revealed publicly last August.
Harding, 39, said she would donate any profits made from new track Wear It Like a Crown to the Christie NHS Foundation, the cancer centre where she has been receiving treatment.
The announcement came on Thursday morning as she thanked fans for their support over her memoir Hear Me Out, which was released last week.
She wrote to Twitter: "So, while I was searching through my laptop for old photos to include in the book I actually came across a song I'd recorded about ten years ago. I've always really loved it, and it made me feel a bit sad that no one ever got to hear it.
"I mentioned this to my team and they said we could release it, and I thought 'why the hell not?' It's called Wear It Like A Crown and it's out on iTunes and streaming..."
Harding went on: "I've literally no idea how this all works anymore, but on the off chance it generates any profit, I'll give it all to the Christie NHS Foundation @thechristienhs where I'm receiving my treatment.
"If you've read my book you'll know just how amazing the Doctors, Nurses and all the staff at The Christie are. They are actual angels. I hope you all like Wear It Like a Crown, give it a listen and let me know what you think. Lots of love, S x."
Sales for Girls Aloud song Hear Me Out from their 2004 album What Will The Neighbours Say? surged last week in support of Harding, who co-wrote the track.
The Celebrity Big Brother winner explained last month she named her book after the song because she's "always really loved it" and "the lyrics have always meant a lot to [her]."
Wear It Like A Crown can be purchased via iTunes and Amazon and streamed via Spotify and Apple Music.
Watch: Sarah Harding cries over never having children