Rihanna & Chris Brown Are On Again? 5 Celebrity Couples Who Drive Us Crazy!

Keeping track of the status of these on-again, off-again pairs has proven to be exhausting!

When we heard recent reports that Rihanna and Chris Brown had broken up, we were skeptical. Sure enough, just days after the rumored split, the on-again, off-again pair has hit the "on" switch. On Wednesday, Rihanna posted this Instagram picture of herself and Chris snuggled up together in a car. E! News reports that the singers were seen cruising around West Hollywood in Brown's Porsche, doing some shopping, and visiting a music studio together. Not your normal post-break-up activities.

Even though we expected it, the fact that Rihanna and Chris can't stay broken up makes us a little bit crazy. Brown's assault on Rihanna may be four years in the past, but as far as we're concerned, he has yet to prove he's a changed man. They're both still so young (Chris is 23, Rihanna 25), and we can't help but wish they'd move on to other people. But we're not holding our breath.

Has there ever been another celebrity couple who infuriated us quite so much? Here are 4 other pairings -- all young people still figuring out their lives -- whose relationships were hard to watch.

Sammi Giancola & Ronni Ortiz Magro - This Jersey Shore couple was dysfunctional from the get-go, but after all the screaming fights, cheating and emotional manipulation -- caught on camera, no less! -- they were never able to stay apart. Lately, there's been talk that they're getting their own show.

Amy Winehouse & Blake Fielder-Civil - By the time the tragic singer married high school drop-out Fielder-Civil, it was clear that she was in trouble -- and he was bad news. They were divorced two years later, after some troublingly violent incidents -- and apparently, after Blake introduced her to heroin.

Levi Johnston & Bristol Palin - It's not their fault that they were thrust into the spotlight as teenagers, but the way that Bristol and Levi continued to stoke the publicity machine -- with a surprise re-engagement, tell-all memoirs, even a nude photo shoot -- was truly maddening.

Britney Spears & Kevin Federline - Did anybody think this relationship was a good idea? Britney and Kevin obviously did, but they only brought out the worst in each other. Their divorce was met with a rousing chorus of "about time!"

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