Wow! What did we just watch?!
Check out the fun show (above) and share your thoughts in the comments!
P.S. We loved watching Bey's Formation in real time! Take what's yours, girl!
We're so smiley silly, you guys—and it's all thanks to this super talented group!
The AH-Mazing voices that won Season 3 of NBC’s The Sing Off (including Scott Hoying, Kirstie Maldonado, Mitch Grassi, Avi Kaplan, and beat-boxer Kevin "K.O." Olusola) are back to dazzle us with impeccable vocal stylings in their arrangement of this 2014 crowd fav!