Pentatonix Perform on 'The Sing-Off' (VIDEO)

Youthful a cappella group Pentatonix gave it their all and wowed the crowd on 'The Sing-Off' (Mon., 8PM ET on NBC) last night. The Los Angeles-based group performed their unique take on Katy Perry's song 'E.T.' and afterward seemed real happy with how it went. Judge Sara Bareilles told the singers how she loved that each member of the group "had your little moment in that song where you just go to shine and to sparkle and we got to see all the dimensions of you."

THE SING-OFF Season 3 Episode 2

THE SING-OFF  Season 3 episode 2 airs Monday September 26 at 8-10 p.m. ET on NBC. The Sing-Off  Show Synopsis:  The second set of eight groups perform together and individually for the judges with the hopes of being named the a cappella champion and receiving the $200,000 cash prize and a Sony Music recording contract. Nick Lachey hosts and Sara Bareilles, Ben Folds and Shawn Stockman serve as judges. Groups performing include: The Collective, Dartmouth Aires, Messiah’s Men, North Shore, Pentatonix, Sonos, Soul’d Out and the University of Delaware Deltones. Read More...