Evan Rachel Wood and Marilyn Manson

When Marilyn Manson split from wife Dita Von Teese after just a year of marriage, it seemed likely that actress Evan Rachel Wood had something to do with it. Despite a huge age gap and a habit of breaking up and making up, Manson and Wood became engaged in January 2010, only to split by October.

Kristin Cavallari and Jay Cutler relax

In July 2011, just a week after their splashy engagement party, Kristin Cavallari and Jay Cutler called time on their engagement. Friends claimed Cutler wasn't into his fiancé going anywhere without him, noting, "He made her choose between him and being friends with a lot of her girlfriends." But they got back together shortly after that and confirmed their re-engagement in late November. Then, two months later announced they're expecting! No word on a wedding date yet, though.

Kat Von D and Jesse James

Though he creepily asserted that Kat Von D was "100 percent" a better lover than his ex-wife Sandra Bullock, Jesse James failed to make the famous tattoo artist his fourth wife. Kat tweeted in July 2011, "I am no longer w Jesse, and out of respect for him, his family and myself, thats all the info I'd like to share. Thanks for respecting that.

Heather Locklear and Jack Wagner Hot Video

Heather Locklear and Jack Wagner got married on Melrose Place over a decade ago, but there will be no real life wedding bells for these two. They announced their split in November 2011. Apparently the blonde entered rehab shortly after the split.

Heather Locklear and Jack Wagner Hot Video

Simon Cowell and Mezhgan Hussainy

American Idol judge Simon Cowell and makeup artist Mezhgan Hussainy put their two-year engagement on pause in early 2012. Cowell, 52, explained: "It's quite a complicated relationship. We have had a break from each other, and we are still incredibly close. I'm vulnerable. It's not on, it's not off, it's somewhere in the middle. I don't know if I will ever get married, but I am happy.