Nash shared a statement explaining her decision to start the account, writing: "Whilst touring is the best job EVER it is currently technically what you might call a passion project for a lot of artists in 2024. A recent survey by Pirate Studios found that whilst gig ticket & festival prices are skyrocketing...the majority of musicians and artists are struggling to be able to afford to actually play shows."
"So this Christmas I'm asking that [you] buy either a piece of my merch or my arse on my new ONLYFANS account katenyash87 to support me paying great wages & putting on a high quality show as I will not sacrifice either of things."
The 37-year-old shared a cheeky photo of her derriere to her Instagram story, accompanied by the slogan "butts for tour buses" and a link to her OnlyFans account.
She explained that "Touring makes losses not profits."
In a follow up Instagram feed post, Nash posted a photo of her behind in a pair of pink fishnet stockings, captioned: "Bum's gone viral lol, goin on stage now bit busy soz xoxo."
Fans are loving the singer-songwriter's bold move, with many leaving praise for Nash in her comments.
"The cheek of it! - this is a really great idea, albeit one that shouldn't have had to happen. Support artists, people!" one commenter urged.
"Making noise hell yeah !!! We got this!!!! You're a HERO!" another wrote.
A third commenter said, "It takes courage to do whatever it takes! A bold move!"
In recent years, the Foundations singer-songwriter branched out to acting, starring in the Netflix hit Glow.
Nash kicks off her UK and EU tour today at Glasgow's Oran Mor, with forthcoming dates in Brighton, Dublin and more, as well as a sold-out show at London's KOKO on 28 December.
The tour is in celebration of her recent album release, 9 Sad Symphonies.