Well, if you're Sinead O'Connor, "certain people" get involved and render your union asunder. Also, your husband gets upset when go out looking around Vegas for weed on your wedding night. That’s right. Poor Sinead’s marriage to her “beloved boyfriend” Barry Herridge was over just 18 days (some reports say 16 - not sure what day they actually split up) after their December 8 Vegas wedding.

Related: Sinead O'Connor weds husband #4, four months after he responds to her "desperate for sex" ad

Sinead wrote on her website: “From the moment myself and my husband got together not long ago, there was intense pressure placed upon him by certain people in his life, not to be involved with me. These were people who had never met me but had formed opinions of me based on what they read about 'Sinead 'O'Connor' in the media etc...Within 3 hours of the ceremony being over the marriage was kyboshed by the behaviour of certain people in my husband's life. 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. It became apparent to me that if he were to stay with me he would be losing too much to bear. And that being with me was not going to serve him positively , career wise or any other wise. I saw his life leave him because of how people close to him reacted. And I can't take anyone's life. And a woman wants to be a joy to her husband. So.. U love someone? Set them free.”

Ah, well. No point in dwelling on it, eh? Onwards and upwards and all that. It’s just a marriage, after all. Those things aren't forever. And it's hardly the shortest marriage ever. In fact, here's a list of one musician marriage almost as short and four shorter than Sinead’s (I couldn’t find five shorter! I tried!). These guys make Kenny Chesney & Renee Zellweger's 128 look like a lifetime!

Ethel Merman and Ernest Borgnine: 32 Days. Ethel and Ernest tied and untied the knot in 1964. Reports of jealousy and “dutch ovens” surrounded the unravelling. 

Cher & Gregg Allman: 9 days/3 years. People like to cite the nine days as fact. The truth is that Cher did file for divorce nine days after they were married in 1975 - because of Allman’s substance abuse troubles - but the filing apparently jolted him into cleaning up and they didn’t officially divorce until 1979.

Carmen Electra & Dennis Rodman: 9 days. OK, I’m using “musician” broadly here but, whatever. It’s between Christmas and New Year’s, so we’re in, like, an alternate universe portal between two big cocktail hours right now anyway. Time magazine says Dennis’ publicist was dubious about the 1998 marriage, saying the basketball star might have been "deeply intoxicated" at the time. And, lo! Nine days later the pair filed for an annulment. The marriage officially ended six months later.

Michelle Phillips & Dennis Hopper: 8 days. The notoriously volatile actor married the Mamas and the Papas star on Halloween 1970. The legend goes that he kept her handcuffed so she couldn’t run away. That went well.

Britney Spears & Jason Alexander: 55 hours. The pop star web her childhood pal on a lark in Vegas in 2004, and filed for an annulment just 55 hours later with a petition that claimed: “Plaintiff Spears lacked understanding of her actions to the extent that she was incapable of agreeing to the marriage.” Sigh. This sounds kind of like a note Britney should carry with her everywhere she goes.