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.