When a program that normally features ordinary people as its central figures usually (but not limited to) {{Dating Sim}}s, {{Game Show}}s, RealityTV and HomeAndGarden programs is suddenly taken over by celebrities. Reasons could be any of the following:

* It may be a RatingsStunt, typically done during the months of November, February, and May when commercial rates are determined (and, in May, the television season generally ends).
* It may be a "special edition" or occasional treat for the viewer (e.g., Richard Dawson's ''FamilyFeud'' primetime specials).
* It may be to get one more season out of the dying CashCowFranchise, or a last-ditch effort to save the show when the real fault is likely to be the timeslot or format (e.g., ''Celebrity Bullseye'' and ''Celebrity Hot Potato'').

When it's a game show, usually the winnings are donated to charity rather than kept by the contestants, as it's hard for the audience to get worked up over celebrities winning even ''more'' money than they already have...unless they're has-beens who really don't have any money anymore.

The longer the format change goes on, the more stretched the definition of "celebrity" will inevitably become. Once the show reaches an installment where the "celebrities" are all comprised of A. People from other shows on the same network or B. People whose main claim to fame was appearing in another reality show, then any RatingsStunt factor is gone.

Speaking of which, this is separate from not only the numerous game shows popular in the 1970s in which contestants had a celebrity teammate, but of course the PanelGame. It also doesn't count if a celeb appears on a game show before becoming famous; that's a case of RetroactiveRecognition.
----
!!Examples:

[[foldercontrol]]

[[folder:Game Shows]]
* All but one Japanese game show (''Panel Quiz Attack 25'') use Japanese celebrities due to TV prize laws [[GameShowWinningsCap limiting civilian prizes to 2 million JPY (about US$25,000) per person and 10 million JPY total]].
* ''BullseyeUS'' changed on December 7, 1981 to ''Celebrity Bullseye'', which added a best-of-three format to the front game (leading to more straddling than there was prior to this point) and removed the prize package from Bonus Island. Interestingly, the show continued having returning champs, resulting in such celebs as Loanne Bishop and Creator/ErnestBorgnine racking up well over $30,000.
* The Australian ''Series/DealOrNoDeal'' had this with celebrities from ''DancingWithTheStars''.
* Inverted with ''Series/{{Definition}}'', as the teams were originally celebrity-civilian and switched to civilians-only on December 16, 1985.
* Subverted by ''Series/{{Distraction}}'', which used former ''BigBrother'' contestants.
* ''Series/DontForgetTheLyrics''
* ''[[DoubleDare1986 Double Dare]]'' had several celebrity episodes (including one with Music/WeirdAlYankovic and [[TheIncredibleHulk Lou Ferrigno]]) playing against each other. Nickelodeon mounted a pilot on July 27, 1987 for a spinoff called ''Celebrity Double Dare'' hosted by Bruce Jenner with teams of celebrities (Scott Baio and Heidi Bohay) and adult contestants, but it never got past there and said pilot never aired.
* ''Series/FamilyFeud'' had several of these over its various incarnations, but of particular note is the "almost celebrity" editions which had teams of celebrity lookalikes playing each other. Oddly enough, they still had to donate their winnings to charity, even though they weren't actually celebrities.
** The British version, ''Series/FamilyFortunes'', currently only runs as a celebrity version somewhat oxymoronically titled ''All-Star Family Fortunes'', despite only two (usually) out of the ten contestants actually being stars...and even then, the "stars" are usually nothing more than average soap actors.
* ''Series/HotPotato'', in what is probably the best example of how it can go very, very wrong. Having aired at Noon for its first thirteen weeks, the show ousted its unique three-of-a-kind contestant teams ("...and WE'RE telegram singers!~") on April 23, 1984 in favor of solo players being paired with two celebrity teammates. The trouble with this was that the celebrities were usually comic actors or comedians who took their wisecracks more seriously than they did the game. The show was canned ten weeks later.
** It should be noted that there was an all-celebrity week during the first part of the show's run, but it was Miss Americas vs. "All-American Sportsmen" and hence stayed true to the three-of-a-kind format.
* ''Celebrity Series/{{Jeopardy}}'': Andy Richter once talked about his appearance with Creator/ConanOBrien.
-->'''Andy:''' The questions were easier than regular ''Jeopardy!''.\\
'''Conan:''' Oh, because it's for charity.\\
'''Andy:''' Oh... I thought it was (''laughing'') because we're celebrities. We're the little dumb show ponies.
** That said, [[http://www.j-archive.com/showgame.php?game_id=3141 Andy's appearance]] is a MomentOfAwesome his score of $68,000 is the '''third-highest one-day score in the show's history'''. That can't all have been due to easy material...although Wolf Blitzer's EpicFail in the same match didn't hurt.
* ''[[Series/TheMole The Celebrity Mole]]''
** Spectacularly subverted with the Dutch version of ''The Mole'', however: it switched from a civilian to an all-celebrity format after Season 4 and has been going on for at least ''eight'' seasons since then. This might be due to the majority of its celebrities ''not'' being pompous famewhores and clearly being in this for the fun.
* ''Series/{{Password}}'' played it straight pretty much all the time except in mid-1974, when ''ABC'' began falling into Type 3 rather frequently in what appeared to be a last grab for ratings before the debut of ''All-Stars''. In February 1975, the show overhauled its format to bring back civilians and offer more money, only dipping very briefly into Type 2 on the series finale.
* ''Power of 10'' had an interesting example, bringing in two players from the concurrent season of ''Big Brother'' to play. Host Drew Carey brought them up to speed on what had happened while they were in the house, although none of these statements were true... well, except the last, which was "I'm the host of ''Series/ThePriceIsRight''".
* A bunch of special episodes in Season 4 of ''Series/RobotWars'' included a celebrity edition where celebrities were added to roboteer teams from that season, the celebrities had to operate the robot for a whole minute before having the option of handing it over to the actual team.
* ''Series/TheWeakestLink'' has had a few of these in (at least) both the UK and US versions.
** The Hip-Hop episode of the NBC run Young MC shamelessly flirting with Anne, Nate Dogg laying waste to geography questions and mocking Da Brat at every turn, Reverend Run's NiceHat...what more do you need?
** The WWE-themed episode of the NBC version, which was hilarious because almost everyone remained completely [[{{Kayfabe}} in character]] for the entire show, leading to such brilliant moments as Triple H refusing to vote out Stephanie who was at the time (in the strictest sense) his boss (as well as his wife) and the Big Show towering over Anne when he was eliminated.
*** The other WWE episode was just as hilarious if not more so. At one point, Stone Cold Steve Austin refused to vote out Debra, saying he couldn't vote out his wife. Later that episode, Bubba Ray Dudley cited the same reason for refusing to vote out his tag team partner D-Von.
** Another NBC episode had cast members from the various series of ''Franchise/StarTrek'' playing.
** One of the more memorable in the UK was the 2007 ''Series/DoctorWho'' edition where the contestants included John Barrowman (Captain Jack), Noel Clarke (Mickey Smith), David Tennant (the Tenth Doctor), Camille Coduri (Jackie Tyler), Nicholas Briggs (voice of the Daleks and Cybermen, among others), and the K9 prop, [[CharacterAsHimself credited as himself]] and the first voted off due to worries about the machine's stability. The Anne Droid from [[Recap/DoctorWhoS27E12BadWolf "Bad Wolf"]] (2005) appeared at the beginning, reciting the opening spiel before the real Anne unplugged it.
* During the 1990s, ''WheelOfFortune'' played this straight. In the 2000s, they occasionally tried a variant where each team consisted of a celebrity ''and'' a contestant; the game was played normally, with the contestant earning cash and trips as usual while the celeb had an identical amount donated to a charity.
** Celebrities have not played on ''Wheel'' since late 2007, however, and no reason has been given for this.
* ''Series/WhoWantsToBeAMillionaire'': One of the reasons the Creator/{{ABC}} version fell down in its final season (2001-02) was about half the episodes being celebrity oriented. The French version took it a step further by '''completely ceasing to cast non-celebrities''' and allegedly giving the cash to charity (much like ''Series/FortBoyard'' years earlier). The UK version has now gone down this route as well. In 2002, the Brazilian version once had Presidential Candidates.
** For the early questions in US celebrity editions (where getting one wrong would [[AllOrNothing send you home empty-handed]]), they would tolerate the current contestant getting hints of varying subtlety from the celebrities still waiting their turn. This ensured that the contestant's chosen charity would at least get something, and made for some funny moments.
* The original ''{{Concentration}}'' had an annual Christmas episode where two celebrities, both dressed as Santa, would match dollar amounts for charity.
* Done every few weeks/months in ''Series/TheChase'', and usually shown on a Sunday rather than a weekday like the normal episodes.
[[/folder]]

[[folder:Reality Shows]]
* ''[[Series/TheApprentice The Celebrity Apprentice]]'' is an {{egregious}} case, as one of the first edition's "celebrities" was Omarosa What's-Her-Name, whose main claim to fame was...competing on ''The Apprentice''. In the second edition, one celebrity was a briefcase model from ''Series/DealOrNoDeal''.
* ''[[BigBrother Celebrity Big Brother]]''
** "Casa dos Artistas" (House of the Artists) was a BigBrother featuring artists as contestants. It was so much like BigBrother it was ScrewedByTheLawyers of the network holding Big Brother's broadcasting rights in Brazil.
* ''TradingSpaces'' had several episodes where neighboring celebrities swapped homes, donned smocks, and got spattered with paint under the guidance of a pair of interior designers. Mind you, this doesn't count the episode where Slash of Guns 'n' Roses just wandered in (because he was a friend of one of the couples) and got put to work sewing curtains.
* ''Series/WifeSwap'' is being revamped with a "Celebrity" edition, with "celebrities" such as Flava Flav, Meatloaf, and Ted Haggard, the evangelical pastor who in 2006 admitted to being with a gay prostitute and using meth. That last bit is probably the only thing anybody knows about him.
[[/folder]]

[[folder:Video Games]]
* The ''[[VideoGame/KaraokeRevolution Karaoke Revolution]]'' series had a number of its more recent installments branded as ''Series/AmericanIdol'' versions.
[[/folder]]

[[folder:Parodies]]
* ''[[Series/ThatMitchellAndWebbLook Numberwang]]'' did this for UsefulNotes/ComicRelief with Creator/ChannelFour's head of numbers [[Series/{{Countdown}} Carol Vorderman]] and Music/FatboySlim's famous father-in-law JohnnyBall.
* A PoliticalCartoon in ''PrivateEye'' said that due to the UsefulNotes/GulfWar's blanket TV coverage, it would be followed by a Celebrity Gulf War.
* The ''SaturdayNightLive'' version of ''Celebrity Series/{{Jeopardy}}'', where the celebs were TooDumbToLive or downright sadistic towards Alex Trebek (played by Will Ferrell). The categories were hilarious easy stuff like "Automatic Points", "How Many Fingers Am I Holding Up?", "[[UsefulNotes/BarackObama Current Black Presidents]]", and "Colors That End In -Urple"...but that didn't stop the celebs from racking up insane halftime totals of -$50,000 or more. Recurring characters besides Trebek included {{Cloudcuckoolander}} Burt Reynolds (played by Norm [=MacDonald=]) and Trebek's sadistic arch-nemesis Sean Connery (played by Darryl Hammond).
** And a brilliant performance of Jeff Goldblum by David Duchovny.
* ''Radio/ImSorryIHaventAClue'' gave us Celebrity ''Series/WhatsMyLine'', where the panellists were asked to guess what Dame Judi Dench did for a living.
** A common [[SelfDeprecation self-deprecating]] insult on the show is to mention a "celebrity edition of ''Radio/ImSorryIHaventAClue''" -- the joke being that all the regular panellists ''are'' celebrities.
* The ''Series/ThirtyRock'' episode "Game Over" had a celebrity version of "Homonym" (a game show mentioned as a cutaway gag in a previous episode) with John [=McEnroe=] failing to distinguish "racket" and "racquet".
* The ''Series/MontyPythonsFlyingCircus'' sketch "World Forum" had famous Communists Creator/KarlMarx, UsefulNotes/VladimirLenin, UsefulNotes/CheGuevara and UsefulNotes/MaoZedong as contestants on a QuizShow about football teams.‎
[[/folder]]
----