Pentatonix does a great remix of the song Little Drummer Boy with multiple solos by everyone in the group including their beat boxer who doesn't usually sing at all. The entire song is done with no instruments, but they do clap and stomp to make it have a great feel to it. I really enjoy this song and hope that everyone who sees this will love it and watch even more Pentatonix videos because they are fantastic!
The Straight No Chasers are the group of A capella singing men who make a remix of several Christmas songs in a funny and interesting tune that is fun to listen to and also to watch their faces and how they react to the music. The Straight No Chasers have a lot of other music as well, but this is one of my favorite performances by them.