Odd Couples: Celebrity Romantic Mismatches of 2012
Ashton Kutcher and Rihanna
When two suddenly single people as hot as Ashton and Rih Rih bump into each other, a hook-up seems inevitable. The sexy pop idol was allegedly spotted doing the walk of shame outside of Kutcher's home early in the morning last March, prompting rumors and uncomfortable questions from the press.
(Photos from left: Jason Merritt/Getty Images, Dave Hogan/Getty Images)