The "Nothing Compares 2 U" star gave one day's notice that she'll marry boyfriend Barry Herridge on her birthday, Dec. 8, at an "un-disclosed location in my absolute dream wedding ceremony."
Herridge called into Irish morning show "The Ian Dempsey Breakfast Show" to say the wedding will be at "a very special place to Sinead."
Little else is known about the wedding, which arrives just months after the singer's third marriage, to Steve Cooney, ended in divorce. The mother of four was also previously married to producer John Reynolds and journalist Nicholas Sommerlad.
In August, O'Connor famously wrote on her blog that her sex life was "so dire" and that "inanimate objects are starting to look good." She boasted that she was "in the peak of her sexual prime and way too lovely to be living like a nun."
She also turned her blog into a dating site with some specific requirements for potential suitors. O'Connor said he had to be at least 44 years old, employed and have natural hair, and also "must not be named Brian or Nigel." On appearance, Herridge appears to fit the bill. Applicants were also asked to "have a sweet heart and [a] filthy mind."