Pentatonix



Pentatonix is an a capella music group, consisting of Scott Hoying, Kirstie Maldonado, Mitch Grassi, Avi Kaplan and Kevin Olusola. The group rose to fame following their victory in the third season of NBC's The Sing-Off.

The group will appear in Sesame Street's 44th season, performing a rendition of the classic "Pinball Number Count" song.