They say opposites attract.
But is that enough to explain some of the following famous couples?
What does a tiny actress see in an enormous boxer? A busty young blonde in an aging Major League pitcher? Heck, what does anyone see in Juan Pablo Galavis?!?
Some mysteries may never be solved... but, hey, whatever works for these pairings!
Click through our gallery of unexpected couples now and sound off: Who will last? Who will split? And, seriously, what is Nikki Ferrell thinking?!?
1. Hayden Panettiere and Wladimir Klitschko
She's like five feet tall. He's like 11 feet tall. And they're engaged!
2. Amber Tamblyn and David Cross
She's 30. He's 49. But, hey, this married couple clearly makes it work!
3. Charlize Theron and Sean Penn
They're both Oscar-winning stars, but come on. Isn't something wrong with this photo?
4. Kim Kardashian and Kanye West
She owes her career to the paparazzi and needs a script to make a speech. He despises photographers and often goes off the rails. It's almost as if this if were a PR stunt.
5. Kate Upton and Justin Verlander
Yes, he's a Cy Young Award winner. But how is she not dating some hot young actor? Or George Clooney?
7. Lindsey Vonn and Tiger Woods
Lindsey Vonn is ridiculously hot and famous. The best she can do is a guy with more cocktail waitresses to his name than recent major titles?
8. Justin Bieber and Selena Gomez
What will it take for her to finally move on from this arrogant jerk face?!?
9. Pamela Anderson and Rick Salomon
If at first you don't succeed, and you make sex tapes with other people... try, try again.