So, who listens to Pentatonix? If you don't, you should try them out. They are an a capella group and they do a lot of covers but they also have some original songs. It's all just astounding work. They are pretty much perfect.
There are five members of this group and no instruments are used. (Except in a few cases such as when they did Radioactive with Lindsey Stirling.)There's Kevin, Scott, Kirstie, Mitch, and Avi, and usually that's where all of the music comes from. Just the five of them. One of the most amazing things about them, aside from their voices (which I swear I would sell my soul to have) is that they seem to have the most pure, beautiful enjoyment of what they're doing and it totally shows. It's gorgeous. Breathtaking. I just can't help but smile with them!
Some of my favorite songs they've done are Carol of the Bells, Royals, Little Drummer Boy, and Radioactive. You should definitely give them a listen if you haven't already. My only warning? You may not be able to stop.

Sorry for the inconvenience, but this message is supposed to have a picture. However due to name confusion I have removed the pic.

-Fablefire

I listen to this song on youtube, and it is a quite interesting group.
http://www.youtube.com/watch?v=3MteSlpxCpo
The music that they have isn't that bad, but not the best. I will listen to some more to see if i like them better.

I enjoyed their cover of "Little Drummer" and "Royale". Their vocals are perfect!
I can't believe I hadn't heard of them before. I'm definitely checking out their other songs.

And their cover of Radioactive is simply amazing! I can't believe how many songs they've done that I've liked.

I've listened to three of there songs so far and I think there pretty good. The songs I've listened to are their Daft Punk medley, Thrift Shop cover, and Radioactive cover with Lindsey Stirling.

I too heard rheir take on Little Drummer Boy, and was quite impressed. It's nice to see popish music taking it back to what pop was about in it's glory days: absolutely amazing vocals. Folks, this is what Pop music is about, not voice modifiers (though they have their place, they shouldn't dominate a pop artist's work), and not songs that practically qualify as an audio form of pornography, but the best vocal work in the music industry. These guys are definitely some of the best, and deserve the pop artist title.

I am really not a fan of these guys. I guess it is unique to see music like this but I don't enjoy them.
I guess it was just me, I am more of an underground listener. I kind of hate pop music with the exception of the Beatles. 

I am glad they do what they do, make chart hits actual revolve around the song rather than the porn.

Pentatonix are great! I only discovered them recently, it seems like they do a lot of medleys and covers?
I've mostly just listened to their medleys, like their Daft Punk, and History of Music ones.