Song 573 ( Naturally 7 - Wall of Sound )

The other night I was watching The Tonight Show with Jay Leno and this band was the act playing at the end of the show; I was blown away at their performance to say the least. They do not play with any instruments, but listening to only the audio you would have trouble telling that. They are very tight and extremely talented; their sound is would be best described as Soul/R&B. They are an A-Cappella group that has a self-described style called "Vocal Play," and everything that you hear is human voice.

Here is the music video on YouTube.

+