With so much talk about who's dating who in Hollywood, it's hard to keep track of a star's romantic past. Test your IQ and guess the celeb ex.

Charli Penn
Aug, 14, 2012

With so much talk about who's dating who in Hollywood, it's hard to keep track of a celebrity's romantic past. One minute, a couple's making headlines and the next — well, they're old news. Test your star IQ and see if you can guess the celebrity exes.