This Justin Bieber Cover is Aca-mazing!

The acapella group, Pentatonix, has been able to do what no other acapella group has done before. Sell albums, reach a diverse audience, be viral sensations, and so much more.

Since winning NBC's The Sing Off in season three, the group has done really well for themselves.

After getting dropped from their label, they formed a YouTube channel and did things their way. Most recently, you may have seen them make a cameo in Pitch Perfect 2. 

While most acapella groups are known for amazing covers, which Pentatonix does do really well, they also have original songs that are really good.

Check out their latest cover of Skrillex and Diplo featuring Justin Bieber, "Where Are U Now?"

And their original song, "Can't Sleep Love"

Can you believe they do all that with just their voices? Aca-Mazing!

Their new album is out October 16th.