Ah, photobombs. They've been happening since the inception of cameras, yet, somehow, they never get old. But it's not just regular ol' folks sneaking in behind their Great Aunt Janice in a picture... Celebs want to get in on the action too!

Stars like Rihanna, Taylor Swift, and Justin Bieber have all been photobombed by other celebs! The fun doesn't stop there, though -- other music makers like John Mayer and Tyler, the Creator have both been the photobombers. It's a two way street of adding a little extra visual interest to the background (or foreground if you're an expert) of a photo!

Get ready to LOL, folks. Start clicking through below to see pictures of the funniest celebrity photobombs!