The Grammy-winning vocal ensemble Pentatonix gained fame through their precise singing and creative arrangements and their ability to perform pop music only with their voices. The quintet won The Sing-Off on NBC in 2011 before establishing themselves as leaders of modern a cappella music through their blend of commercial success and their exceptional vocal skills and musical diversity.

The worldwide success of Scott Hoying, Mitch Grassi, Kirstin Maldonado, Kevin Olusola and Matt Sallee became possible through their popular YouTube covers and creative song medleys. The group's YouTube videos featuring "Hallelujah," "Daft Punk" and "Mary, Did You Know?" have reached hundreds of millions of views because they masterfully merge intricate harmonies with vocal percussion and basslines to create performances that match full-band productions.