[[caption-width-right:350:L - R: Avi, Kirstin, Scott, Mitch and Kevin.]]

Pentatonix, aka "PTX," are an ACappella singing group.

Scott Hoying, Kirstin Maldonado and Mitch Grassi grew up in Arlington, Texas and sang in choirs together. They recorded a Website/YouTube [[https://www.youtube.com/watch?v=ev0SZgNC21E cover]] of [[Music/LadyGaga "Telephone"]] in an attempt to win a "meet the cast of ''Series/{{Glee}}''" contest. They didn't win, but when Scott learned about ''Series/TheSingOff'', they were inspired to audition. With advice from ''Sing-Off'' staff member and Scott's college friend Ben Bram, they added Avi Kaplan, the bass singer, and invited Kevin "K.O." Olusola to join them on vocal percussion after seeing his viral "cello-beatboxing" video on [=YouTube=]. They won the show's third season.

PTX have released four [=EPs=] and two studio albums thus far, while regularly releasing [=YouTube=] videos of their music. They have had multiple viral videos, most notably "Evolution of Music/{{Beyonce}}" and a Music/DaftPunk medley which reached 100 million views in November 2014 (one year after it was posted). Both videos received wide media attention as well. Pentatonix has headlined multiple US and European tours and one Australasian tour, and opened for Music/KellyClarkson's ''Piece by Piece'' tour. They've performed pop, electronic, dubstep, R&B, and hip-hop music in their signature ACappella style. They're the first ''Sing-Off'' alums to have an album go platinum (''That's Christmas to Me'') and also the first to win a Grammy (for "Daft Punk"), and the first ''a cappella'' group to have a No. 1 album in the United States.

In May 2017, [[https://www.facebook.com/Pentatonix/videos/1383192448425088/ Avi announced his departure from Pentatonix]], stating that he couldn't keep up with the fast pace of the group. PTX as a whole took the opportunity to begin premiering various solo projects (typically involving actual instruments): Kirstie as [[https://www.youtube.com/channel/UC6nJcoe15N6nL_DmUisfHOA/videos kirstin]], Avi as the frontman of [[https://www.youtube.com/user/AviKaplanMusic Avriel and the Sequoias]], Scott and Mitch together through their [[https://www.youtube.com/user/sup3rfruit SUPERFRUIT]] collaboration, and Kevin via his [[https://www.youtube.com/user/kolusola/videos pre-existing solo act]]. PTX nonetheless sold tickets for a Holiday 2017 tour, and later announced that Matthew Sallee, a member of fellow ACappella group [[https://www.housejacks.com The House Jacks]], would join them for the duration. This was apparently an extended audition, as they officially inducted him as a replacement bass in February 2018 and have announced new tour plans, presumably after Kirstie finishes her Broadway run in ''Theatre/KinkyBoots'' in April.

!!Members of Pentatonix include (from left to right in the picture):
* Avi Kaplan - born 17 April 1989.
* Kirstin Maldonado - born 16 May 1992.
* Scott Hoying - born 17 September 1991.
* Mitch Grassi - born 24 July 1992.
* Kevin Olusola - born 5 October 1988.
* (Not pictured) Matthew Sallee - born February 11, 1994

* ''PTX Volume 1'' (June 2012)
* ''[=PTXmas=]'' (November 2012)
* ''PTX Volume 2'' (November 2013)
* ''[=PTXmas=]'' Deluxe Edition (2 bonus tracks) (November 2013)
* ''PTX Volume 3'' (September 2014)
* ''That's Christmas To Me'' (October 2014)
* ''[[SelfTitledAlbum Pentatonix]]'' (October 2015)
* ''A Pentatonix Christmas'' (October 2016)
* ''PTX Volume 4: Classics'' (April 2017)

!!Pentatonix provide examples of the following tropes:

* ACappella: They have a unique take, incorporating electronic influences in their percussion, beatboxing, and song structure.
* {{Adorkable}}: All of them, especially when they're geeking out about their interests, such as Scott talking about Music/{{Beyonce}} or Mitch talking about corgis.
* AffectionateNickname: Kevin has many used by the other members: Kev, Kevy, Kurvy, Kevo...
* AffectionateParody: ''Pentatodrix'', a parody by good friend of theirs, Todrick Hall, playfully insulted the group and their mannerisms, such as Scott's height and Avi's body rolls.
* AfterTheEnd: The setting for their cover of [[Music/ImagineDragons "Radioactive"]] with Music/LindseyStirling. Blasted, graffiti'd buildings, oversaturated visuals, and costumes with plenty of dusty leather and goggles.
* AntiLoveSong: Original song "The Baddest Girl":
-->Do you really love me? (Tell me that you love me, say it)\\
Do you really care? (I won't hold you to it, put me through it)\\
Do you really want me? (Don't worry, my heart is made of steel)\\
Do you really.. at least pretend to love me girl,\\
I don't care if that love is real.
* AttentionDeficitOohShiny: Kirstie, in their collaboration with Todrick Hall:
-->'''Kirstie:''' ''[as the [[Film/TheWizardOfOz Witch of the West]]]'' Don't want no money! ''[to Avi/Lion]'' I like your beard.
* AudienceParticipationSong:
** One of the most well-received parts of their concerts is where they divide the audience into thirds and have each third sing a part (as Team Scott, Team Mitch, and Team Kirstie), then have Avi and Kevin do their thing beneath.
** Lately, they've been teaching the audience the three parts for the chorus of "On My Way Home."
* AWildRapperAppears: In the single version of "Can't Sleep Love", Tink jumps into the bridge of the song to rap for a couple of seconds, before disappearing again.
* BassoProfundo: Avi, full stop. The man can rattle the floorboards on incredibly deep, low tones.
** One fan-filmed YouTube video shows them needing to stop in the middle of singing "Hit the Road, Jack" when Avi hits such a low note, ''[[https://www.youtube.com/watch?v=eeHRokYRVms he blows a speaker out.]] ''
* {{Bowdlerise}}: They tend to remove curse words and other potentially racy language in their songs, the most notable being their performance of "OMG" on ''Series/TheSingOff'', explained in part by Kevin's very religious background. Fortunately, it rarely if ever gets in the way of their songs and it [[TropesAreNotBad really does make the songs more palatable to a wider audience]].
* BookEnds: The beginning and end of "The Wizard of Ahhs", a musical parody of and homage to [[Film/TheWizardOfOz the iconic 1939 film]] featuring Todrick Hall, begins and ends with the line ''Somewhere Over the Rainbow''.
* BigEater: Avi is this, especially with meat. During their tour vlogs, it's not uncommon to find him trying out as much food as possible.
* TheCameo: All five of them appear very briefly in ''[[Film/PitchPerfect Pitch Perfect 2]]'', though they don't actually sing. They ''do'' sing in their cameo in ''Series/KCUndercover''.
* CheshireCatGrin: Mitch can pull off a very unnerving smile, which borders on a SlasherSmile in their "Aha!" music video.
* {{Chiaroscuro}}: The [[http://www.youtube.com/watch?v=sp7PS_UN8Lo video]] for their original song "Run To You" and their [[http://www.youtube.com/watch?v=jt3oAyK_IG8 cover]] of "Dance of the Sugar Plum Fairy."
* ChildhoodFriends: Scott, Mitch and Kirstin are this for each other.
* ChristmasSongs: Three full albums of them, ''[=PTXmas=]'', ''That's Christmas to Me'', and ''A Pentatonix Christmas''.
* ChronologicalAlbumTitle: All of their main albums are named by their volume number.
%%* CloudCuckoolander: Scott can be this.
* ColorCodedCharacters: During the time of the 2015 album release, this was very common for them during their tour, as their colours match with their album colours. Cue all of the Franchise/PowerRangers [[https://twitter.com/powerrangers/status/656557161850388480?lang=en references]]:
** Avi is usually represented by black or grey, though he's often also represented by the colour white if some [[https://farm8.staticflickr.com/7559/26903280941_7255365796_b.jpg vibrancy is needed]].
** Kirstin is [[PinkMeansFeminine pink]].
** Scott is [[BlueIsHeroic blue]].
** Mitch is green.
** Kevin is yellow.
* ComicalAngryFace: The behind-the-scenes for their "Radioactive" cover features a "super-frown count" of Lindsey Stirling and several members of the group doing their comical angry faces for various reasons. Final tally? Four.
* ConceptVideo: Thus far:
** Their cover of "Starships" by Music/NickiMinaj features the group putting together a spaceship out of random household objects.
** Their cover of "Aha" by Music/ImogenHeap, in which zombified band members stalk a man and his girlfriend.
* CoverVersion: The majority of their songs so far. However, they often drastically rearrange the songs and like to do medleys, such as "Daft Punk" which combines seven different Daft Punk songs in one and "La La Latch" which combines "La La La" and "Latch", both of which have lead vocals by Music/SamSmith. ''Pentatonix'', in contrast to earlier albums, is mostly original songs with only "If I Ever Fall In Love" as a cover (plus covers of [[Music/{{Skrillex}} "Where Are Ü Now"]], "Cheerleader", and "Lean On" in the deluxe version.)
* CurtainsMatchTheWindow: In the video for "Daft Punk", Kirstie not only wears blue contact lenses but a pale blue wig and blue make-up across her eyes and nose.
* EmbarrassingNickname: Scott's mother used to call him ''Scottybuckets'' as a child.
* FingerlessGloves: Avi sometimes wears these; even on stage and during interviews.
* FiveTokenBand: Very nearly a natural example: Two gay white guys, a Hispanic girl, a Jewish guy, and a black guy.
* TheFriendsWhoNeverHang: Kirstin and Avi were this for a long time, for reasons that have never really been explained. It doesn't help that they both unfollowed each other on twitter on the exact same day, leading to many fans to believe that the two actually don't get along at all. They've been shown to be interacting a little more over the years, however, but don't expect to ever see them hanging together on their own.
* HalloweenEpisode:
** The video for their cover of "Aha". Acappella music by way of a zombie flick.
** They performed [[http://thelantern.com/wp-content/uploads/2016/10/IMG_0653-1-1024x683.jpg in costume]] for their tour appearance in Columbus, Ohio on October 30th, 2016.
* IcyBlueEyes: The band sports pale blue contact lenses in their "Daft Punk" video, except for Kevin who wears futuristic CoolShades.
* {{Medley}}:
** Their Music/BritneySpears cover from ''The Sing-Off''
** Their Music/{{NSYNC}} medley from their Website/YouTube channel.
** The "Evolution of Music" video, spanning over five hundred years' worth of popular music.
** "The Evolution of {{Music/Beyonce}}" which is exactly what it sounds like.
** "Music/DaftPunk", which combines "Technologic", "One More Time", "Get Lucky", "Digital Love", "Harder, Better, Faster, Stronger", "Television Rules the Nation", and "Around The World"
** "The Wizard of Ahhhs"
** "Evolution of Music/MichaelJackson". It is nothing short of awesome.
** They also did one of ''Series/SesameStreet'' songs based around "Pinball Number Count."
* MrFanservice:
** Judging by his intro part in "Pusher Love Girl", Avi seems to have taken this role, but mostly only in the music.
** Watch them perform "Let's Get It On" live in concert. [[http://www.youtube.com/watch?v=hAboEgHvBbM Avi provides free lap dances for the "chair girls."]]
* NeoclassicalPunkZydecoRockabilly: ACappella pop, ACappella hip-hop, ACappella electronica...
* NiceHat: All of the boys on occasion, though Avi and Kevin are both the most common. While they're both a fan of snapbacks, Avi is also commonly seen in beanies.
* NumerologicalMotif: Five.
* OnceAnEpisode: At the end of many of their [=YouTube=] videos, Avi will say, "Don't forget to subscribe," in a deep voice.
* TheOner: Some of their early [=YouTube=] videos consist of the group sitting on a couch in front of a stationary camera and singing live.
* PerformanceVideo: They have several of these, such as the video for their cover of Music/FleetFoxes' "White Winter Hymnal."
* PlatonicLifePartners: Scott and Mitch are this, having been friends since childhood, and living together.
* PrecisionFStrike: Subverted; you have to listen closely to catch it, but Mitch is actually singing "Bad Mitches like me" in their cover of "Starships" instead of "bitches."
* PrettyInMink: Kirstie wore a white fur jacket on the album cover of ''That's Christmas To Me''.
* RenaissanceMan: Kevin plays cello at professional level (as well as saxophone and piano) along with inventing celloboxing (playing cello while beatboxing). He's a gifted singer, composer and arranger with his own solo EP (''The Renegade'') and speaks five languages fluently, including French and Mandarin Chinese. He graduated pre-med from Yale with a degree in Asian Studies which included a year and a half as an exchange student at China's two best schools, Beijing and Tsinghua University. He put a career in medicine on hold to explore his musical calling.
* SelfTitledAlbum: Well, almost. PTX is a nickname for the group, and their first four albums were "PTX, Volume 1," "[=PTXmas=]," "PTX, Vol II," and "PTX, Vol. III." Finally played completely straight with ''Pentatonix''.
* SesameStreetCred: They've already [[http://www.youtube.com/watch?v=0b-v-wMR69k appeared in an episode]].
* TheSmurfettePrinciple: Kirstin is the only girl of the group, and she receives special treatment because of it. According to the boys, Kirstin gets her own dressing room, make-up artist, and other treats; especially on tour.
* SomethingCompletelyDifferent:
** Their collaboration with Music/LindseyStirling on Music/ImagineDragons' "Radioactive" (and later again on Music/{{Stromae}}'s "Papaoutai"). ACappella music... with cello and violin.
** In their concerts, they bring out Kevin's cello and have him cello-beatbox in order to give the rest of the vocalists a bit of a break.
* TheStoic: Avi sometimes comes across as this during interviews, as he tends not to speak unless he is asked a direct question or if he's speaking along with group. [[NotSoStoic If you watch their livestreams or vlogs, however, you will see that this is far from the truth.]]
* TeamDad / TeamMom: Kevin tends to be the former, while Avi is the latter. It helps that they're the older members of the group.
* TheLastOfTheseIsNotLikeTheOthers: Their first four albums all contain their nickname, "PTX," in the title; the fifth one is titled "That's Christmas to Me." Their sixth resumes the pattern, being a true SelfTitledAlbum.
* VocalTagTeam: Scott takes lead most often, but Kirstie and Mitch carry several songs apiece, and Mitch usually does the rapping when it's needed. Avi has sung lead on a few songs, and even Kevin gets in the mix with the odd solo here and there, especially in some of the more recent covers.
* VocalDissonance:
** Despite having the [[BassoProfundo deepest]] voice of the group, Avi is 5'11" to Kevin's 6'1" and Scott's 6'3".
** Kevin's singing voice can also be quite high at times, which you wouldn't guess based on his appearance or his beat boxing skills.
** Though he's since shaved it, Mitch's high voice created quite a contrast with his beard.
* VoiceTypes: The average American has a vocal range of one-and-a-quarter octaves; a trained singer typically has two and a bit. The members of Pentatonix have a ''lot'' more, easily qualifying as [[JustForPun bisectional]].
** Avi is a BassoProfundo but can function as a tenor. [[http://youtu.be/fu2adThK7NQ One video]] pegs his range as ''three-and-a-half'' octaves.
** Scott primarily sings tenor lead, but can function as a bass, such as in "It's The Most Wonderful Time Of The Year" when Avi has lead.
** Kirstie tops out at mezzo-soprano, but has access to the whistle-tones made famous by Music/MariahCarey.
** Mitch typically plays the part of the alto. That's crazy enough as it is, because that makes him a CrossDressingVoice singing the part of a woman, but it gets crazier still when you see him run the gamut from tenor to soprano over the course of "Aha!" alone. When they do [[Music/{{Queen}} "Bohemian Rhapsody"]], he hits the high note. Mitch [[http://youtu.be/PQ0xe5idUNc?t=49s also has a whistle register]], almost as high as Kirstie, though maybe not as consistent.
** And Kevin is a high tenor on the occasions when he sings. He and Mitch often noodle around very close harmony, occupying basically the exact same ranges in "Run To You" and "Can't Help Falling In Love". (This also speaks well of his skills as a musician, as he often has the hardest notes, either because they clash with Mitch on purpose or because they're smack-dab in the middle and surrounded by a whole bunch of other stuff.) When he flips into falsetto, such as in "Imagine," he actually has the highest notes in the song, even farther up than Kirstie goes.
* WhiteMaleLead: While every member save Kevin has sung lead on at least one song, Scott is the most common lead, and Mitch after him.
* XMakesAnythingCool: According to Scott, the group was originally going to be called "The Pentatonics," but a friend suggested dropping the "The" and adding X at the end.