It's not often Simon Cowell is speechless on America's Got Talent — but it turns out, Benjamin Hightower was able to do that!

Pentatonix is an American a cappella group ... Kaplan in 2017), they gained fame after winning NBC’s “The Sing-Off.” Known for performing without instruments, using only their voices ...

Before the game began, Pentatonix, a five-part American a cappella vocal group, took to the football field to sing their country’s national ... Pentatonix Performs the National Anthem Social media ...

Grab your pitch pipes -- "The Sing-Off" has announced ... and season three winner Pentatonix will also return to the stage it conquered in 2011. Additionally, "Sing-Off" host Nick Lachey will ...

Pentatonix, an American a capella group known for their covers of pop songs and holiday classics, was formed in 2011 after a successful run on TV singing competition series “The Sing-Off.” Pentatonix ...

He said the reaction from the crowd ... As for the over-arching appeal of Pentatonix, he said the magic was there the minute he saw them on “The Sing Off” 12 years ago.

He says reaction from the ... As for the over-arching appeal of Pentatonix, he says, the magic was there the minute he saw the group 12 years ago on “The Sing-Off.” “It was the first group ...

While, sadly, 2011 turned out to be "The Sing-Off's" last season, before it was cancelled amid protests from its cult following, the winners of that third and final season, Pentatonix, have ...