Hollywood's biggest stars are getting photobombed left and right by other celebs! Back in April, Kevin Spacey gave his best evil eye behind an unsuspecting Conan O'Brien and Matthew Perry, who were busy smiling for the cameras at the Vanity Fair-Bloomberg White House Correspondents' Association…omg!
Bombs away! When they weren't snapping selfies, celebs were busy perfecting the art of the photobomb in 2013. Check out 9 of our faves.omg!