[[caption-width-right:350:From left to right: Mitch, Scott, Kirstie, Kevin, Avi]]

Pentatonix, or "PTX," as they like to call themselves, are an ACappella singing group consisting of five incredibly talented young musicians: Scott Hoying, Kirstie Maldonado, Mitch Grassi, Avi Kaplan, and Kevin Olusola. Scott, Kirstie, and Mitch grew up together in Arlington, TX. They recorded a Website/YouTube cover of "Telephone" by Music/LadyGaga in an attempt to win a "meet the cast of Glee" cover band. They didn't win the contest, but when Scott learned about ''Series/TheSingOff'', they were inspired to audition. With advice from ''Sing-Off'' staff member Ben Bram, they added Avi, the bass singer, and invited Kevin to join them on vocal percussion after seeing his viral "cello-beatboxing" [=YouTube=] video.

Together, the group produces a unique, full, layered sound that almost seems too complex to come out of five people. Scott, Kirstie, and Mitch form the melodic and harmonic core of the music, while Avi and Kevin lay down a remarkably solid base. Pentatonix won the third season of ''The Sing-Off'', and have been creating impressive cover arrangements and original songs ever since. They have five EP albums out thus far with a fourth full length album planned, and they regularly release [=YouTube=] videos of their music. They have had multiple viral videos, most notably "Evolution of Beyoncé" 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 made multiple US and two European tours with an Australasian tour scheduled for August 2014. They've performed pop, electronic, dubstep, and hip-hop music in their signature ACappella style. And they're the first Sing-Off alums to have an album go platinum (''That's Christmas To Me'').


* 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)

!!Pentatonix provide examples of the following tropes:

* ACappella: They have a unique take, incorporating electronic influences in their percussion and beatboxing.
* {{Adorkable}}: All of them, especially when they're geeking out about one of their interests. (For example, Scott talking about Beyonce or Mitch talking about corgis.)
* 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. BadAss.
* 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: Arguably in their collaboration with Todrick Hall:
-->Kirstie (as the Witch of the West): "Don't want no money! (to Avi/Lion) I like your beard."
* AudienceParticipationSong: One of the most well-received part of their concert 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.
* BassoProfundo: Avi, full stop. The man can rattle the floorboards on incredibly deep, low tones.
* {{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 child friendly.]]
* 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''.
* 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."
* ChristmasSongs: Two full albums of them, one appropriately named "[=PTXmas=]" and the other entitled "That's Christmas To Me".
* CloudCuckoolander: Scott can be this.
* 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 two of their music videos.
** The video for their cover of "Starships" by Music/NickiMinaj. The band puts together a spaceship out of random household objects!
** The video for their cover of "Aha" by Music/ImogenHeap. Zombified band members stalk a man and his girlfriend!
* CoverVersion: The majority of their songs so far.
* CurtainsMatchTheWindow: In their Music/DaftPunk medley, the band members wear Icy Blue Eyes contact lenses (except for Kevin who wears Cool Shades). Kirstie also wears a pale blue wig and make-up.
* FiveTokenBand: Very nearly a natural example: Two white guys (both of whom are gay), a Hispanic girl, a Jewish guy, and a black guy.
* HalloweenEpisode:
** The video for their cover of "Aha". ACappella music by way of a zombie flick.
** The video for "Dance of the Sugar Plum Fairy" is also rather dark and eerie, if toned down compared to "Aha."
* IcyBlueEyes: The band sports pale blue contact lenses in their "Daft Punk" video, except for Kevin who wears futuristic CoolShades.
** CurtainsMatchTheWindow: Kirstie also wears a pale blue wig and make-up job in this video.
* {{Medley}}:
** Their Music/BritneySpears cover, from ''The Sing-Off''
** Their Music/{{NSYNC}} medley, from their [=YouTube=] channel.
** The "Evolution of Music" video. A medley spanning over five hundred years' worth of popular music.
** "The Evolution of {{Music/Beyonce}}" which is exactly what it sounds like.
** A Music/DaftPunk medley, simply titled "Daft Punk".
** "The Wizard of Ahhhs"
* 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...
* NobodyLovesTheBassist: Averted entirely. Avi has a very robust fandom.
* OnceAnEpisode: At the end of almost every [=YouTube=] video, Avi will always say, "Don't forget to subscribe" in a deep voice.
* TheOner: Most of their [=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, for example the video for their cover of Music/FleetFoxes' "White Winter Hymnal."
* PrettyInMink: Kirstie wore a white fur jacket on the album cover of "That's Christmas To Me".
* SelfTitledAlbum: Well, almost. PTX is a nickname for the group.
* SesameStreetCred: They've already appeared in an episode. A clip from which can now be seen [[http://www.youtube.com/watch?v=0b-v-wMR69k here!]]
* SomethingCompletelyDifferent:
** Their collaboration with Music/LindseyStirling on Music/ImagineDragons' "Radioactive" (and later again on Creator/{{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.
* TheLastOfTheseIsNotLikeTheOthers: Their first four albums all contain their nickname, "PTX," in the title; the fifth one is titled "That's Christmas to Me."
* VocalTagTeam: Scott takes lead most often, but Kirstie and Mitch carry several songs apiece. Even Avi gets into the mix on several of their tunes.
* VocalDissonance: Despite having the [[BassoProfundo deepest]] voice of the group, Avi is second-shortest of the guys.
* 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 [[IncrediblyLamePun 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 plays tenor lead, but can function as a bass.
** Kevin is a high tenor on the rare occasions when he sings (in "Run To You" his part is notated as an alto part sometimes and a tenor at others).
** 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"]], it's ''Mitch'' who hits the high note, not Kirstie. Mitch [[http://youtu.be/PQ0xe5idUNc?t=49s also has a whistle register]], almost as high as Kirstie, though maybe not as consistent.
* WhiteMaleLead: While every member save Kevin has sung lead on at least one song, Scott is the most common lead.