Space Channel 5
Pop legend Michael Jackson plays a bit part as "Space Michael" in developer Sega's rhythm game Space Channel 5. (He gets a bigger part in the sequel.)
Saints Row: The Third
Actor Burt Reynolds plays the mayor of fictional city Steelport in ridiculous open-world action game Saints Row: The Third. Because of course he does.
Mass Effect 3
Famed astronaut Buzz Aldrin makes a brief appearance in the epilogue of developer BioWare's Mass Effect 3. He was the least controversial part of that ending.
Grand Theft Auto IV
Comedian Ricky Gervais appears in Grand Theft Auto IV's comedy club. You can watch him on TV in your apartment or catch the live show.
Vice City Stories
Another Grand Theft Auto gem: Musician Phil Collins appears as himself in the '80s-tastic Vice City Stories. You can go to an in-game Collins concert if you have $6,000 for a ticket.
Former Black Sabbath singer and anti-bat activist Ozzy Osbourne appears in Double Fine's adventure game Brütal Legend as The Guardian of Metal. This means he sells you upgrades.
Back to the Future
Although newcomer A.J. Locascio provides the voice for Marty McFly in Telltale Games' Back to the Future series, the films' star Michael J. Fox appears as two McFly relatives in the final episode.
Celebrities have been lending their voices and likenesses to video games for years, and you need only look at the voice-cast lists for big games like epic first-person shooter Call of Duty: Black Ops to see how prevalent they are.
But some appearances are more subtle, relevant or just straight-up awesome. Here are seven celebrity cameos that actually belong in their respective games.