10 Shocking Celebrity Splits

Brad Pitt and Jen Aniston. Absolutely everyone was shocked by the out-of-the-blue announcement that Brad and Jen were no longer - especially since Star magazine had Jen pregnant with Brad's baby on its cover when their split was announced! Turns out Pitt had co-star-itis, a common affliction among Hollywood leading men.

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Ryan Phillipe and Reese Witherspoon. Ryan and Reese seemed built to last, which is why everyone was floored when Reese filed for divorce in November 2006. Phillippe had a case of co-star-itis as well, with his leading lady, Abbie Cornish. Not exactly fooling around with Angelina Jolie, but Phillippe's not exactly Brad Pitt, either.

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The Girls Next Door and Hugh Hefner. When all three of Hugh Hefner’s girlfriends - Holly Madison, Kendra Wilkinson, and Bridget Marquardt - moved out of the mansion at once to pursue other projects, and younger men, you could have pushed Hef over with a feather. He's bounced back nicely, with three new gal pals following him around, as his Playboy empire flounders.

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George Clooney and Sarah Lawson. Cocktail waitress Sarah Lawson seemed to have chased the bachelor out of George Clooney, and a marriage seemed imminent. But Georgie couldn't give up the single life, and instead gave up Sarah in May 2008.

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Jimmy Kimmel and Sarah Silverman. When the funniest couple in showbiz called it quits, people thought it may be a joke. When they reconciled, then broke up a second time, people stopped thinking that.

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Nick Lachey and Jessica Simpson. While 'The Newlyweds' certainly had their ups and downs, it was still shocking to hear their marriage was really, truly kaput in 2005. Luckily for Jessica, there are lots more chicken in the sea.

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Madonna and Guy Richie. While not unexpected, given Madge's track record (13,378 guys and counting), their split after eight years of marriage last year caught many unawares.

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Britney Spears and Justin Timberlake. Former Mouseketeers Justin Timberlake and Britney Spears were the cutest, perfectest little pop star couple you could ever dream of, which is why their sudden split in 2002, amidst allegations of Britney's infidelity, when we had been told she was a virgin (!), was just too much for anyone to fathom.

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Jude Law and Sienna Miller. Jude's romp with his nanny in 2005 doomed this previously-joined-at-the-hip couple. Nanny romps tend to do that.

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Simon Cowell and Terri Seymour. 'Idol' fans were surprised when Simon Cowell and his girlfriend of several years split, seemingly out of nowhere. But sometimes in life, that's how it happens.

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