Some celebrity couples are matches made in heaven. These were pretty much the opposite. Just in time for Valentine's Day, here's a rundown of 14 toxic twosomes we can't believe were ever together.
1. Rihanna and Chris Brown
Rihanna and Chris Brown dated for two decent chunks of time, the first of which ending after he beat her senseless. Never a good sign. Nor was taking him back after that, but she's moved on with Drake ... thank goodness. Good luck, Karrueche!
2. Amy Winehouse and Blake Fielder-Civil
Perhaps the most lethal of any love we've ever seen, Amy Winehouse and Blake Fielder-Civil abused drugs so fervently that she could never recover from that viscious cycle, passing away at age 27. He, meanwhile, ended up locked up for a long time.
3. Mel Gibson and Oksana Grigorieva
Mel Gibson and Oksana Grigorieva weren't together long, and for good reason. These two went nuclear on each other ... well mostly him on her voicemail.
4. Jessica Simpson and John Mayer
Jessica Simpson and John Mayer equals sexual napalm. That's never healthy. Only sexual.
5. Ronnie Magro-Ortiz and Sammi Giancola
Ronnie and Sammi from Jersey Shore. These two need no introduction. Just clips of them brawling. Of which there are plenty.
6. Justin Bieber and Selena Gomez
Justin Bieber and Selena Gomez had a long love affair that involved him taking her virginity and a whole lot of partying and frequent breakups, fights and general emotional turmoil. It's possible it wasn't meant to be. And by possible we mean obvious.
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