Superfruit, started off as a comedy YouTube channel on which best friends Scott Hoying and Mitch Grassi, of the Grammy-winning a cappella group Pentatonix, goofed off, played games, and vlogged...

A cappella sensations Pentatonix have reached superstar status — with three Grammys, 13 million YouTube subscribers, their own Christmas special, and several platinum records to their credit — but at...

  A cappella sensations Pentatonix have already conquered reality television (as champions of The Sing-Off Season 3); the stadium concert circuit (as the openers on Kelly Clarkson’s recent megatour); the...