A cappella group, Pentatonix, performs their hit song "The Baddest Girl" for Larry, then they teach him how to beatbox, and even have a special song just for the 100th episode up their sleeve.
The a capella group Pentatonix is known for their awesome covers of popular songs, and they're back at it again! Check out their awesome cover of Lorde's song 'Royals'! - via YouTube/PTXofficial
The Sing-Off winners Pentatonix helped launch Oreo's latest campaign by leading a performance on the streets of New York City on Tuesday.