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Sinead O'Connor's fourth marriage lasted about as long as the honeymoon.

The Irish singer announced her split from Barry Herridge on Monday. In a heartfelt message on her blog, she revealed that she and Herridge lived together as man and wife for  seven days before ending their relationship for good on Christmas Eve - 16 days after they wed in Las Vegas.

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O'Connor blamed "intense pressure" placed on her husband by members of his inner circle, and her "wild" journey to find marijuana on the night of their nuptials. Herridge, an addiction counselor for children, apparently frowned on the latter.

"Within three hours of the ceremony being over the marriage was kyboshed by the behaviour of certain people in my husband's life," the "Nothing Compares 2 U" singer wrote. "And also by a bit of a wild ride I took us on looking for a bit of a smoke of weed for me wedding night, as I don't drink. My husband was enormously wounded and very badly effected by that experience and also by the attitude of those close to him toward our marriage."

Though she still loves her husband "very much," O'Connor said she realized he would be sacrificing too much to stay with her and was ending the marriage because  " he is too nice to do so. And too nice to trap."

While admitting that she "rushed into getting married," the singer said she planned to "get on with being fully me. With never an apology for ANY part if being FULLY ME. No matter what."

O'Connor married Herridge on Dec. 8, her 45th birthday,  three months after they'd met. Herridge responded to the Irish singer's public plea for love.

In a bizarre blog titled 'Is Sinead About to H**p Her Truck?'  O'Connor bemoaned her lack of partnership, writing, "I am in the peak of my sexual prime and way too lovely to be living like a nun. and it's VERY depressing."

Her criteria for a "very sweet sex-starved man" included:

• He must be no younger than 44.  He must also have a job!

• "Must be living in Ireland but I don't care if he is from the planet Zog."

• "Must not be named Brian or Nigel."

• "Must be blind enough to think I'm gorgeous."