Sinead O'Connor Sinead O'Connor

Sinead O'Connor took to her blog Wednesday to announce that she and boyfriend Barry Herridge, a children's addiction counselor, will marry Thursday.

"We will post a photo or two here on the site as soon as possible afterward," the singer wrote on her website. Very happy girl."

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O'Connor will also be celebrating her 45th birthday Thursday. She said the wedding will take place at "an undisclosed location."This will be the singer's fourth marriage. She has four children.