IOHO, it's a tie. Benedict Cumberbatch photobombing Meryl Streep and Margaret Cho during the live telecast was pretty amazing, but we have a soft spot for Leonardo Dicaprio so he gets the honor, too.
50 Cent posted a photo of himself and Naomi Campbell on his Instagram at a pre-Globes party. In it, you can clearly see a mischievous Leo (looking almost sinister-like with all that hair!) in the background.
"I get [photobombed] by the hottest people in the world. You should try living [without] limits," wrote Fif.
Fiddy even got to take a picture WITH the man himself (see below) on top of the photobomb. Lucky him!
Tbh, neither Benedict's nor Leo's surprise cameos topped J.Law's photoboming of Taylor Swift during the singer's red carpet interview with Ryan Seacrest at last year's ceremony. Click here to relive that magic.