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.

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.