(May 23, 2011 - Source: Kevin Winter/Getty Images North America) more pics like this »
1. Brangelina
The biggest, most-often used celebrity portmanteau out there is Brangelina. It didn't take long for this one to catch on when Brad Pitt and Angelina Jolie went public with their relationship in 2005, and it might be the only one that's seen steady use even after its novelty has long worn off. It might also be the only reason you've ever heard the word "portmanteau" before.