Kelly Clarkson is just so loveable that you almost want her to photobomb every photo you have. And Ellen, of course, is just as adorable.
It would be great if Ellen and Portia just invited her into the photo. Seems like a win-win.
Beyonce
When you're at Beyonce level fame, you are no longer under obligation to remain friendly and approachable to your fans. Of course, it's still nice that she does.
She made this fan's day but posing and looking cool for the camera. That pic is definitely for the books.
The Entire Cast of Game of Thrones
Could you get any better than this? Grabbing a selfie with at least one cast member is great, but this woman managed to catch the whole gang. Wait, who is that man peering out from the side there? Oh, only George R.R Martin himself.
She really did score big time here.
Ken Jeong
These two lady sportscasters couldn't have been more thrilled to have their beloved Community star, Ken Jeong, butt into their photo at the Dodgers game.
Somehow, after all these years, he still looks hungover.
Chris Pine
You may not recognize the guy photobombing Chris Pine immediately, but you would recognize his voice. That funny fella in the back is Patton Oswalt, the voice of Remy in Ratatouille (and a host of other hit shows), and he wanted to show Chris Pine who's boss at the 2015 Vanity Fair Oscars Party.
Chris Pine clearly didn't realize it at the time as he was in full Vanity Fair mode, but we're sure he had a good laugh. Although, we just hope that Chris knew who Patton was, or that would have gotten awkward real fast. We wonder if Chris was Patton's only victim that night...