Hozier has become the latest musician to be added to Irish radio DJ Greg McQuaid's charity single for breast cancer awareness.
The Bray native joins the likes of Florence Welch of Florence and the Machine and Spandau Ballet on the song, Boob Spelled Backwards Is Boob, named after a remark by the radio show host's eight-year-old son.
"Irish Greg", as he is known, hosts a morning radio show on KFOG FM in San Francisco.
Speaking to The Herald in February, McQuaid spoke of his hopes of getting Bono to take part when U2 arrive in San Francisco later this month.
The single is expected to be completed in time for Breast Cancer Awareness Month in October.