With Drew Barrymore  and Adam Sandler 's new romantic comedy, Blended, coming out this week, we couldn't help but notice something. This is the third time the duo has been on screen together as a romantic couple! This observation got us thinking about some of our other favorite rom-com costars who keep falling in love. Think Kate Hudson  and Matthew McConaughey  . . . We don't hate it! Check out our full list.