Sing Off with Pentatonix

It is an addiction. 

Or even better, a remedy to ones music soul every night.
Pentatonix, the multi talented, energetic, techno a capella group that had won NBC's reality series The Sing-Off , haunt me every night remarkable music- using only their voices .

To those of you who don't know what a capella is, it is a without-instruments music. People only use vocal to produce music. There is no need to carry an instruments while making music. 
Make life easier.

Kevin Olusola, Avi Kaplan, Mitch Grassi, Scoot Hoying and Kirstie Maldonado of Pentatonix.

                                         

Introducing the five forces that combined to form Pentatonix:
Avi Kaplan, the bass singer that can hit solid low notes
Kevin Olusola, the beat boxer that makes sick beat that will leave you breathless. 

Both bass and percussion section are famously known as the meat and potatoes of Pentatonix.

Pentatonix will not be complete without the other three that holds music down vocally. Singers
Kirstie Maldonado, the only female, together with Mitch Grassi and Scott Hoying.

Pentatonix planned smart arrangements that heat up the stage and crazed off the audience with their killer performance.

Their video has been consistently excites me.

 They deliver stunning, deliberate performance that always give you the adrenalin rush or and brings you to the peak of the song and BOOMED, hit you straight on the face with breathtaking ending.

Pentatonix makes music fun and is like what artist Sara Bareilles said, THEY MAKE IT THEIR OWN.

They are more than what I have just described above. Well, if you want to experience what I have been through,
Hear it for yourself. 

Articles:
http://thereadzone.com/2013/11/11/pentatonix-does-it-again-with-daft-punk-medley/#more-1542

Petition:
https://www.change.org/petitions/saturday-night-live-book-pentatonix-as-a-musical-guest#

News, interviews
http://www.hlntv.com/video/2013/11/08/cappella-pentatonix-sing

Randomly picked music (I just can't find one that is not causing me great surprises):

And this, is their official website, where you can actually buy their music or download free music sheets.
http://www.ptxofficial.com/