Some things can't be unseen, and all of these pics fall under that category.
We don't know this gorgeous actor's name, but she seems familiar somehow...
Look at those steely blue eyes. Those are actor's eyes for sure. But who is he?!
Whoa, who's this handsome devil with all his real hair? We can't put our fingers on it...
Who's this spacefaring silver fox, and how can we score a stardate with him?
We're getting strong U.K. vibes from this smoldering thespian. We want him to read us Shakespeare 'n' stuff, or whatever. What's his name?
Va-va-voom! We're not sure who this actress is, but for some reason we picture her as a sexy archaeologist who has to fight off an invasion of giant car robots from space.
We can't seem to identify this attractive gentleman, yet for some reason we imagine him as a psychotic killer who loves to torment billionaire vigilantes. But why?!
This actor seems really familiar. We're pretty sure he was a sexy It Boy in the '90s who's now settling nicely into quite a handsome middle age. Who is he, though?
We don't know who this good-looking fellow is, but we do know this: He'd surely make an excellent superhero.
Boy Band Boy
Say, this kid has star quality. He's a sexy guy with just enough femininity in his looks to make him compelling to tween girls. Do you think he can sing?
LeBron James Franco
Mug Mashers is a great Twitter and Instagram account that mashes up the faces of celebrities who you'd never expect to see even in the same room together, let alone the same body and face. This mashup of LeBron James and James Franco is a perfect example.
Steve Harvey Keitel
We're pretty terrified of what this bad lieutenant would do to us if we said a stupid answer on "Family Feud."
Jackie Channing Tatum
The coolest thing about Jackie Channing Tatum is that he does all his own male stripping in his movies. He never uses stunt strippers!
Conan O'Brien Cranston
Conan O'Brien Cranston gives easily the most intimidating late-night interviews in all of show business. "I am the one who hosts!"
Steven Tyler Perry
You'd think "Steven Tyler Perry" would be a mashup of Steven Tyler and Joe Perry of Aerosmith, but no; it's a mashup of Steven Tyler of Aerosmith and Tyler Perry of the Madea movies. Why? Don't ask that question.
Natalie Portman and Scarlett Johansson
Oh! Turns out she's a mashup of two of our favorite actors: Natalie Portman and Scarlett Johansson, co-stars of 2008's "The Other Boleyn Girl." Now it all makes sense.
Leonardo DiCaprio and Sean Pean
He's actually two people mashed together! They're Hollywood actorvists Leonardo DiCaprio and Sean Pean.
Michael Fassbender and Benedict Cumberbatch
Actually, he has two names, because he's a mashup of two different actors: Michael Fassbender and Benedict Cumberbatch. Do you call him Fassbatch or Cumberbender? It's really up to you. He'll answer to both.
Chris Evans and Robert Downey Jr.
Do you see it now? That one superheroic dude is actually a mashup of Chris Evans and Bob Downey, better known as Captain American and Iron Man of The Avengers superhero team!
Brent Spiner and Patrick Stewart
Of course it's a combination of the actors Brent Spiner and Patrick Stewart, aka Data the robot and spaceship captain Jean-Luc Picard. They're from one of the "Star Trek" shows.
Tom Cruise and John Travolta
Ah, now we see! He's Scientology buddies Tom Cruise and John Travolta if their two separate faces were combined into one face.
Justin Timberlake and Justin Bieber
Well, of course he can sing. Because he's a combo of Justins Timberlake and Bieber. He's Justin-tin Timbieberlake!
Megan Fox and Angelina Jolie
Ohhh, now we know why we thought of that. It's because the actress is a mashup of Megan Fox from "Transformers" and Angelina Jolie from "Tomb Raider." Well, those are both great movies, so we still think our idea could sell.
Heath Ledger and Tom Hardy
Ah-ha! It's because he's a face mashup of actors Heath Ledger and Tom Hardy, who both played supervillains in Batman movies (The Joker and Bane, respectively). Well, mystery solved!
Brad Pitt and Ethan Hawke
Oh, OK, now we see it. Some Photoshop genius mashed up the faces of Brad Pitt and Ethan Hawke. Clever!