A photo gallery of the funniest celebrity photobombs. A classic celebrity photobomb is so hilariously priceless that Hollywood is getting more and more into the art of photobombing stars and unsuspecting strangers. So what does it take to snap a silly shot like a celebrity? Photobomb as many times as you can, targeting your family and friends! Not everyone can photobomb celebrities on the red carpet like Jennifer Lawrence, but anything is possible. Even Kevin Spacey knew while on a leisurely jog through a park that it was the perfect time to photobomb tourists. All one needs is a combination of the right timing, some lightning fast thinking, and a great smile (or frown, depending on your mood that day). Most important of all, have fun!These Hollywood funny faces range from totally wacky to slightly creepy, or a little bit of both. It doesn't matter what kind of face you're making as long as you get in the shot! For Tom Hanks's photo bomb, all it took was one very sleepy diner to get his famous and funny shot. Click through for the all the best celebrity photo bombs, including Tina Fey making faces behind her pal Amy Poehler and Justin Bieber squeezing in between Katy Perry and Russell Brand. Then decide which Hollywood star photobombs best!
Jimmy Fallon and Cameron Diaz Drop in On a Couple of Tourists
Rihanna Photobombs "Full House" Cast
Rihanna photobombs "Full House" trio Bob Saget, John Stamos, and Dave Coulier on "Good Morning America," Jan. 29, 2014.